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Difficulty: Very hardTransitions: Chronology and Sequence

In 1967, geophysicist Jason Morgan proposed that Earth's tectonic plates move along rigid boundaries, a hypothesis that promised to revolutionize geology but required empirical verification. ______ researchers analyzed magnetic anomalies along ocean ridges to test Morgan's model, finally publishing a definitive set of global plate motion data in 1972.

Which choice completes the passage with the most logical transition?

  1. In the interim,Answer
  2. B
    Beforehand,
  3. C
    Right off the bat,
  4. D
    Nevertheless,

Answer

In the interim,
The correct answer is the phrase that indicates the research occurred during the time between Morgan's 1967 proposal and the 1972 publication of the final data. 'In the interim' perfectly captures this chronological window and matches the academic tone of the passage.

Step-by-Step Solution

1
Analyze the chronological anchors in the passage.
The passage establishes two key temporal markers: Morgan's initial proposal of the hypothesis in 1967, and the final publication of the empirical data in 1972.
Identifying the timeline of events is necessary to determine the correct chronological relationship.
2
Determine the relationship between the sentence with the blank and the temporal markers.
The blank introduces the phase where researchers conducted analyses to test the model. This testing happened after the 1967 proposal but before the 1972 publication.
Understanding where the action fits in the sequence allows for the selection of an appropriate transitional phrase.
3
Evaluate the choices to find the transition that correctly represents this relationship.
'In the interim' is the only option that denotes an action taking place during an intervening period of time between two established events.
Selecting the transition that accurately reflects the chronology and matches the academic tone of the text.

Key Concept

Identifying the chronological relationship between sequential events in a passage and selecting a transition that correctly positions an event in time while maintaining an academic tone.
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Topics

Transitions: Chronology and Sequence

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