Your first impression of a new professor is
a. an example of an implicit personality theory.
b. an example of a explicit belief.
c. a naive behavioral explanation.
d. unprofessional and misleading. e) inherently inaccurate.

The first impression you have about a new professor is "a) an example of an implicit personality theory".

Explanation:

To understand this answer we need to analyze all of our options.

First of all, e) inherently inaccurate. For this to be true, we should have to be all wrong about our beliefs about the new professor which could happen but the probability of asserting something is far greater than the probability of been all wrong.

Second, d) unprofessional and misleading. We can't know if it is misleading if we don't know the truth. To be misleading we should know the truth first and then make a false argumentation. However, it is unprofessional if you are a purist of judgments.

Third, a naive behavioral explanation. This is a value judgment because "naive" is a treat of personality that can't be objectively correct for being wrong or right. Instead is a stereotype.

Fourth, an example of an explicit belief could be a very good option if we consider that the first impression is a belief. However, is not explicit because to be explicit we should know all about it and make an argument based on a posture.

The fifth is correct because it is implicit, we have already associated it with the new professor without knowing if it is true or not. However, it describes a certain association, inference or assumption.