The correct answer is C. deprecatory.
A derisive attitude is one that is scornful or contemptuous. It is an attitude that shows a lack of respect or admiration. In the context of the question, the director is showing a derisive attitude towards some of the members of the committee. This means that he or she is scornful or contemptuous of them.
The other options are not correct because they do not accurately describe the director’s attitude. An enthusiastic attitude is one that is full of excitement or eagerness. A respectful attitude is one that shows regard or deference. An encouraging attitude is one that gives support or confidence.
In the context of the question, the director’s attitude is not enthusiastic, respectful, or encouraging. It is derisive.