Based on the text, why are deep-sea monsters the stuff of nightmares?
their appearance and limited access to them makes them scarier.
humans dislike the things they cannot see and touch in person.
there is a lack of evidence of their actual existence in the ocean.
scientists can only guess what some of them look like.

When conducting research online, the key word or key phrase you type into a search engine should be a. as general as possible to include all possible results. b. unchanging from search to search so that you get consistent results. c. as clearly defined as possible so in order to narrow your search. d. flexible and applicable to a variety of topics.