Problem: If Nancy's boss truly was offering her job security for sexual favors, how many times would this have to occur for it to constitute quid pro quo?
a. Just once and the firm would be liable
b. Enough so that a reasonable person would feel that it was impossible to do their work
c. Three times and the firm would be liable (The "three strikes and you're out" rule).
d. Offering a job benefit in exchange for sexual favors never rises to the level of quid pro quo harassment, so the base of this question is flawed. She would have to show she was threatened in some way.
e. It depends on what a reasonable person would consider "severe" or "pervasive."