The correctly punctuated answer choice is the second option: "Zora has a family emergency in the middle of week 2. She sends an email, therefore, to her instructor and advisor." Remember that there are almost always commas after (and sometimes before, during a pause in speech) conjunctive adverbs, such as therefore, however, furthermore, thus, etc.
This quote is an example of personification. Having just witnessed an important part of the witches ' prophecy being fulfilled when he was named Thane of Cawdor, he believes that the rest may be soon be within his grasp. He is overcome by ambition and a desire for the...