The contagion theory describes how a. propaganda affects collective behavior. b. emotions encourage people toward collective action. c. public opinion shapes collective behavior. d. resources encourage people toward collective action.

The correct answer is B.

The contagion theory is a theory within the communication field that describes how the crowd has an emotional component that can cause a sort of hyptonic impact on individuals.

It was introduced first by Gustave Le Bon in 1885. It explores the fact that, sometimes, individuals undertake temporary and unreasonble courses of action when they are in a group, but act normally when they are not.

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