Direction: Choose the appropriate idiom from the options below to fill in the blank in the sentence, making it grammatically and contextually correct.
The scientist spent countless hours reviewing data, knowing that ____________________ and that even the smallest error could jeopardize the entire experiment.
1
the proof of the pudding is in the eating
2
the cat was out of the bag
3
the ball was in his court
4
he was a square peg in a round hole
5
the devil was in the details