Answer:
The quote that is an example of direct characterization is:
A. "The demon was a big, cheerful-looking demon with a bland, round face. He eyed father."
Step-by-step explanation:
We have direct characterization when we are told by the narrator what the character is or looks like. It is an explicit characterization. For instance, if in the story there are sentences such as "he was nervous" or "she had big brown eyes", the author is using direct characterization.
That is what we have in letter A. The quote uses direct characterization to let readers know what the demon looked like. We are clearly told he was "big" and "cheerful-looking", and he had a "bland, round face".