Which contains an error in logic as worded?
wearing bell-bottom pants and a tie-dyed shirt was a fad during the 1960s.
a fad during the 1960s was wearing bell-bottom pants and a tie-dyed shirt.
a fad during the 1960s was someone wearing bell-bottom pants and a tie-dyed shirt.
bell-bottom pants and tie-dyed shirts were fads during the 1960s

correct answers:

c. they use panels.

d. they include images and words.

e. they contain gutters.

remember, the goal of an adjective clause is to add more information to a noun or a pronoun. as you can see from the examples above, you can add information by including a longer adjective clause or tighten up a sentence by turning the adjective clause into an adjective phrase.