I like using my phone.
She was using her pen to do her essay.
we were using a microphone to sing loud.
Subject
Easy way to remember is to find the verb and ask who or what
In this it would be who or what was late? The answer would be you.
The correct answer is B. They suspect something strange may be going on.
Explanation
According to the fragment, it can be inferred that the central theme of the discussion between Charlie and Steve is about a strange fact that caught their attention and they are going to check what has happened. In addition, they discard the option that it was a meteorite as Steve says "It couldn't be the meteor. A meteor couldn't do this". According to the above, the correct answer is B because they can not explain the event that just happened.
c) As the sun set, the nocturnal animals began stirring.
Star Trek
Dr. McCoy
Bones
All three above are proper nouns, formal names, and they are all capitalized.