This note refers to which central idea found in a simple way to create suspense?

a. what almost no one had in 1980 and almost everyone had in 1990 was a remote control.
b. even viewers who knew the answer for sure stuck around, in order to be gratified.
c. “how do you bake a cake? ” has the wrong structure.
d. the basic narrative fuel is always the slow unveiling of the final answer.