You can look up the answer and that could help you :), or I like to check back into the book for answers
Answer: option (D).
Explanation: Nicholas fiddled with his thumbs, because, he didn’t dare look at his sister as she towered over him.
Commas are mostly used to divide or separate parts of a sentence in order to make the meaning clear and the sentence easier to read. Commas mark a brief pause in the sentence, usually at a point where you would naturally pause if you were speaking rather than writing.
<u>Answer</u>:
Present Perfect Continuous: "I have not been allowing this to happen."
<u>Explanation</u>:
Present Perfect Continuous Tense indicates that something started in the past and is continuing at the present time.
