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 answer would be letter A. The contagion theory describes how propaganda affects collective behavior. It is an intense influence to people that may result to emotional outbursts and unreasonable actions. Contagion theory is one of theories of crowd behavior which was created by Gustave LeBon.

The correct answer is B not A

Explanation:

emotions encourage people toward collective action.

Truehope this : )