In which part of a professional email should you try to be brief, but highly descriptive?

Question

A. The subject line
B. The blind carbon copy (bcc)
C. The emoticons
D. The domain

I think the Answer is A, is that right?

Answer 1

I tend to agree, because based on the subject line I may or may not read the text itself. That also tends to make me decide if the thing is spam or not.