Thinking about backward propagation

If your predictions were all exactly right, and your errors were all exactly 0, the slope of the loss function with respect to your predictions would also be 0. In that circumstance, which of the following statements would be correct?

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Possible Answers

The updates to all weights in the network would also be 0.
press 1
The updates to all weights in the network would be dependent on the activation functions.
press 2
The updates to all weights in the network would be proportional to values from the input data.
press 3

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