Answer:
I think that B is the answer
Explanation:
the boy eats and drinks the milk and cookies that he knows he cannot pay for.
(I believe this is right)
I most contexts, no. It can be considered an error if viewed from a programmer's perspective, because a bug is viewed as an error in the code of a program. If it is not viewed from a similar perspective, then it is not a synonym. Thesaurus.com can be a helpful place for you.
this is confusing and too long please explain more
The infinitive phrase in this sentence is to speak clearly, and it is used as a subject of the sentence. What/who is essential to being understood? To speak clearly.