While preparing a presentation on space exploration, a student took the following notes:
* Voyager 1 and Voyager 2 are robotic space probes launched by NASA in 1977.
* Voyager 1 was launched on September 5, 1977, to study the outer Solar System.
* Voyager 2 was launched on August 20, 1977, also to study the outer Solar System.
* Voyager 1 entered interstellar space in 2012.
* Voyager 2 entered interstellar space in 2018.
The student wants to contrast when Voyager 1 and Voyager 2 entered interstellar space. Which choice most effectively uses information from the given notes to accomplish this goal?
- While Voyager 1 entered interstellar space in 2012, Voyager 2 did not enter this region until 2018.Answer
- BVoyager 1, which was launched on September 5, 1977, entered interstellar space in 2012.
- CLaunched in 1977, Voyager 1 and Voyager 2 were both designed to study the outer Solar System.
- DVoyager 1 entered interstellar space in 2018, while Voyager 2 entered interstellar space in 2012.
Answer
The option stating that Voyager 1 entered interstellar space in 2012 while Voyager 2 did not do so until 2018.
The correct option effectively contrasts the interstellar entry times of the two probes by presenting the correct years (2012 for Voyager 1 and 2018 for Voyager 2) in a contrasting structure using the conjunction 'while'.
Step-by-Step Solution
Key Concept
Rhetorical Synthesis: Comparison and Contrast