Option 1 -> Incorrectly matches "hit the hay" (go to sleep) with meeting a deadline context.
Option 2 -> Incorrectly pairs "hit the hay" with deadline and "burn the midnight oil" with following a trend.
Option 3 -> (A)-(II): burn the midnight oil = work late; (B)-(III): jump on the bandwagon = follow trend; (C)-(IV): spill the beans = reveal secret; (D)-(I): hit the hay = go to sleep. All idioms correctly matched.
Option 4 -> Incorrectly matches "jump on the bandwagon" with meeting deadline and reverses sleep/work idioms.
Hence, Option 3: (A) - (II), (B) - (III), (C) - (IV), (D) - (I) -> Each idiom perfectly fits its context: working late to meet deadlines (burn the midnight oil), joining a popular trend (jump on the bandwagon), revealing secrets (spill the beans), and going to bed after a tiring day (hit the hay) -> correct