B. Roots
Roots are the smallest meaningful parts of words. For example the root word of aquamarine would be Aqua, which means water. So the root word can also give you a hint on the meaning of the word.
Hope this helps :)
Answer:
While I was smoking my cigar, a fire engine came roaring around the corner.
Explanation:
In the third option it's showing the time when the fire engine came and that too in correct form of words.
Bella didn’t study and whatever is after because, because it is saying why she did not study.