Is this "ideal experiment" approach solely for stimuli that contain an experiment/phenom.+are S/W questions?

Got the previous question right pretty easily + within time constraint. Went a minute over time with this one and found it harder lol. Still got it right tho(thank god)

SMH thought that since its question 25 they would want to trick me so I chose AC E -_-

this is the second question i've got wrong because I've never heard of the word being used in the AC before and skip it... any advice? do I need to start reading a thesaurus before bed? ugh

literally never heard of the word deleterious so I immediately skipped over A...