Which quotation from act 1.3 in the tragedy of julius caesar is the best example of foreshadowing?

The quotation in the act 1.3 of the Tragedy of Julius that is the best example of foreshadowing is : 
1. The soothsayer saying the ides of march
2 When caesar fainted in the public square
3. when caesars wife  warned him about the danger
4. When brutus said nothing bad could happen to caesar

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