Your first option, "I have taken all the stress I can stand.", is a line of dialogue.
Dialogue is speaking/talking. The second and last options cannot be examples of dialogue because they are not being spoken (you can tell by the lack of quotation marks).The third option is also incorrect because it is what is written, as it says "the study reported" (the study does not speak). Therefore, the first option is correct.
A MOOC is a massive open online courses. Believing the hype is something I cannot answer for you. It is an opinion, and it is yours to answer.
"Egotism" is an inflated sense of one's importance; it's being conceited or vain. The egotist feels superior to others physically, intellectually or in some other way. "Egoism" is a preoccupation with oneself, but not necessarily feeling superior to others.
It means the person chooses to use more of his emotions to react to a certain situation or resolve issues rather than using logic or brainpower.
I believe the answer would be “all of these”
