On average, how many more pounds do breakfast skippers weigh than people who eat breakfast?

This is a tricky question - new studies actually show that people who skip breakfast aren't at all heavier than people who don't skip it. The myth that people who regularly breakfast aren't as heavy as people who do skip it has arisen through bad scientific studies that were being conducted in the past. Newer ones, however, show that this isn't the case. For that reason, your question is invalid :)

Your answer is a. coordination

The attention line is placed above the recipient line, that is, above the name of the firm to which the mail-piece  is directed.