From the first sight I thought that all of the options are suitable, but then I realized that the most powerful tool that makes audience to listen (not just hearing) to pay attention to the most important part of speech is to slow down or pause. It is called situational semantic pause which is used during a speech, usually after the words on which people should be focused, so that the quiet will make audience comprehend its importance.
C-A resume dose not need to be 100% accurate
He featured their work in his magazine.
The answer is 2, because it is way bigger than the other stars, with a radius of 432,288 mi.
It is also estimated their are over 100 billion stars in the galaxy.