<span>B maybe the correct answer, only because the last choice has a comma at the end and not a period. (but if you just made a typo while copying and its supposed to be a period, then that's the answer.)</span>
Answer: the third one
Explanation: it would make sense as that is the most common way to introduce something and get someone's interest
C is the answer, I think!
Is the question asking about what is the meaning of Trepidation?
The word that links nouns, pronouns and phases to other words are called prepositions. There are many and they are used as connectors (eg.: on, at, in, between, under, in front of, above, among, etc).