A firm handshake communicates confidence , not the nervousness, due to the various sources.
And in the US you are supposed to give a decent firm handshake to make a good impression.
So I wold pick A. from the given choices
Are there only 3 choices? something like it communicates confidence - would be a better choice.............
"Science backs up what the etiquette books have been saying all along: A firm handshake helps make a good first impression for both males and females. A July 2000 University of Alabama study found that consistent with the etiquette and business literature, there is a substantial relationship between the features that characterize a firm handshake (strength, vigor, duration, eye contact and completeness of grip) and a favorable first impression. "
also here, p 149:
Let me know if you have any questions
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