Far from being a ______ act of rebellion, the protest was meticulously planned and executed, demonstrating a deep-seated commitment to political reform. (Select the pair of words that best complete the sentence.)

✓ Correct Answer: Option A

The phrase 'Far from being' signals a contrast. The protest was 'meticulously planned and executed,' so the blanks must describe something unplanned or unrehearsed. 'Spontaneous' and 'impromptu' both mean done without forethought or planning.