I believe that the closest synonym for the word overwhelmed is awestruck. It isn't jubilant, because that means happy. And overwhelmed isn't necessarily happy, it is just a strong emotion. Flattered and gracious just don't fit here.
Among the choices, option B. Hasn't, is a singular contraction. "Hasn't" is the shortened word for "has not". The rest of the choices are plural contractions: Don't from do not, Haven't from have not, and Weren't from were not.
Answer:
your question is so long, I am willing to help if you explain in depth
Answer:
a thesis is similar to an umbrella because an umbrella covers everything it protects, in the same way a thesis should cover the entirety of a text.
Explanation: