Rearrange the following sentences to form a meaningful and grammatically correct paragraph:
P. The group of scientists was looking for a new planet outside of our solar system, known as an exoplanet.
Q. They observed the far-off star using a powerful telescope in search of a telltale dimming of its brightness.
R. They found a new planet, establishing its existence through a series of follow-up observations.
S. This slight dimming would indicate a planet passing in front of the star.
Show answer & explanation
Correct answer: C
Explanation
The sentences form a coherent paragraph in the order P, Q, S, R.
P introduces the main subject: scientists searching for an exoplanet.
Q describes the action they took: observing a star using a powerful telescope to look for dimming.
S logically follows Q by explaining why they were looking for dimming: it indicates a planet passing in front of the star.
R concludes the paragraph with the outcome: they found a new planet and confirmed its existence.