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Zorluk: ZorDetermining Stated Sequence of Events

Read the following passage carefully:

Long before Dr. Hélène Laurent published her definitive analysis of Lake Vostok sediment cores in 2018, her research team faced years of technical and logistical challenges. In 2005, initial seismic surveys revealed a thermal anomaly beneath the East Antarctic ice sheet, prompting an international consortium to authorize exploratory drilling. However, physical core extraction did not commence until five years later, following two years devoted entirely to engineering specialized hot-water drills. In mid-2014, while preliminary geochemical scanning was underway in her Geneva laboratory, Laurent unearthed an uncataloged 1999 survey log from an earlier Soviet expedition. This archival discovery prompted her to re-evaluate the sediment depth calculations she had presented at the Oslo Climatology Symposium just two months prior to finding the log. Re-analyzing the core samples with calibrated isotopic sensors in late 2015 finally confirmed pre-glacial organic markers, supplying the crucial evidence needed for her eventual publication.

According to the passage, which of the following events occurred FIRST chronologically?

  1. The compilation of a survey log during a Soviet expeditionCevap
  2. B
    The authorization of exploratory drilling by the international consortium
  3. C
    The commencement of physical sediment core extraction
  4. D
    The presentation of sediment depth calculations at the Oslo Climatology Symposium

Cevap

The compilation of a survey log during a Soviet expedition
The passage explicitly states that the Soviet expedition survey log dates from 1999 ('uncataloged 1999 survey log'). Although Dr. Laurent did not discover this document until mid-2014, the event itself—the creation of the log during the Soviet expedition—took place in 1999, making it the earliest event among all options.

Adım Adım Çözüm

1
Scan the text for explicit dates and temporal markers associated with each event.
Identified dates: Soviet survey log (1999), seismic surveys and drilling authorization (2005), equipment design (2008), core extraction commencement (2010), Oslo presentation (early 2014), log discovery (mid-2014), re-analysis (late 2015), and publication (2018).
Establishing the calendar year for each milestone reveals the true chronological order regardless of narrative structure.
2
Compare the historical dates of the four option choices.
The Soviet expedition survey log dates to 1999, whereas consortium authorization was in 2005, core extraction began in 2010, and the Oslo presentation took place in 2014.
Determining which event has the earliest calendar date answers the question.
3
Verify that the 1999 Soviet expedition log is the earliest stated event.
1999 is earlier than 2005, 2010, and 2014.
Confirms the earliest chronological event.

Anahtar Kavram

Determining Stated Sequence of Events with Non-Linear Narrative Order
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