Question

the kepler - 452 system was identified by nasas kepler mission during its primary survey phase from 2009 to 2013. orbital modeling showed that kepler - 452b completes one revolution every 385 days at a distance comparable to earths from the sun. ____ follow - up observations were prioritized in the 2015 exoplanet archive to refine estimates of planetary mass and radius.
23 ● mark for review
which choice completes the text with the most logical transition?
a) subsequently,
b) conversely,
c) for example,
d) in contrast,

Explanation:

The text describes the identification of the Kepler - 452 system and orbital modeling first (2009 - 2013), then the follow - up observations in 2015. We need a transition word that shows a sequence of events. "Subsequently" means after a particular event or time, which fits the chronological order here. "Conversely" and "In contrast" are used for showing contrast, and "For example" is for giving an example, which are not suitable in this context.

Answer:

A. Subsequently,