As a member of the diplomatic corps, alex was given special training in the customs, language, and religions of the country where he would be living. however, alex probably needed little training to correctly interpret his hosts' expressions of emotion as revealed by their
a) body postures.
b) facial expressions.
c) hand gestures.
d) tones of voice.

B) facial expressions.

Explanation:

As a diplomat, Alex needs to understand the people he’s dealing with, because what they do is represent their countries in mission like solving conflicts, for example; and that kind of training is very useful, especially reading facial expressions where he can reliably detect certain emotional states expressed through the face and decide how to act or behave with diplomacy.

what are the events? you didnt list any

it is due to the halo effect as the impression of the boy created earlier.on the mind of the principle affected his decision