Hello there!
Your correct answer will be 2. by.
Brady
<span>B. She is mortified. hope it helps.</span>
I would say "a" as I personally would be more likely to give someone what they are asking for if they gave me reasonable evidence why they deserve a raise over receiving a smile or how I perceive their body language.<span />
This is a late answer but it's the first one. (The muse-guy "scatter[s] creative fairy-dust all over your typewriter . . . .") Hope I helped! :)