Question: Which statement on the preferential attachment model is correct? A node in the preferential attachment model on average has a higher degree than nodes added

Which statement on the preferential attachment model is correct? A node in the preferential attachment model on average has a higher degree than nodes added later. If a preferential attachment model does not include the preferential attachment mechanism, its degree distribution can still satisfy the power-law. The degree exponent of a preferential attachment model depends on the number of links added at each time step. The number of nodes in a preferential attachment model does not increase over time

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