I like it. Pretty deep. I used to write poems, too :)
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.
Answer: I hosted a birthday party last Sunday.
Explanation: You need to capitalize. BUt I could be wrong
