Which of these sentences avoids using any pronouns with unclear antecedents? A. The job applicant gave his application to the office manager and asked if he could call back.
B. The author told her mother that she could still take pleasure in children's books.
C. A teacher in the author's high school shared her enthusiasm with the author.
D. Mark asked Barry when his biology report on sustainable fuels was due.

a, a knight

the correct answer is option d. none of these. it is noted that options a, b, and c share the same content.

despite the valid answer provided at the last sentence of each of the options, a question/answer format shouldn't include humourous themed responses such as "you bet your thermal pj's we do." - unless of course, the answer is carried out in an informal environment. this could be replaced with a simple "yes" or "it is necessary".

the question should be re-phrased to a more appropiate syntaxis. instead of "do we need the greenhouse effect? ", it should be written as "is the greenhouse effect necessary? " in order to give it a general scope, instead of limiting the answer to the needs of "we" the humans.