The part of speech that has the underlined word in a sentence is…
The answer isn't A because it doesn't provide the emotion of the speaker. The answer is B because it has to do something with the expression with the relation of place, like "well." The answer isn't C because it doesn't involve things occurring at the same point in time and space. The answer is D because it shows the relationship between a noun and a pronoun, like "by." So the answers are B and D.