Match the Term to Its Definition by Filling in the Letter

Match the term to its definition by filling in the letter or letters before the term in the appropriate blank.
$$\begin{array} { | l | l | l | } \hline \text { A Acting crowds } & \text { M. New social movernents } & \text { Y. Collective action } \\\hline \text { B. Collective identity } & \text { N. Coalition } & \text { Z. Insecure participart } \\\hline \text { C. Political process theory } & \text { O. Expressive crowd } & \text { AA Concemed participart } \\\hline \text { D. Collective memory } & \text { P. Social dilermuna } & \text { BB. Curiosity seeker } \\\hline \text { E. Parnic } & \text { Q. Hostile outbursts } & \text { CC. Ego-irvolved participant } \\\hline \text { F. Free-rider problem } & \text { R. Craze } & \text { DD. Social movement orgarizations } \\\hline \text { G. Social movernents } & \text { S. Milling } & \text { EE. Resource mobilization theory } \\\hline \text { H. Interpretive phase } & \text { T. Circular reaction } & \begin{array} { l } \text { FF. Value-oriented social } \\\text { movernents }\end{array} \\\hline \text { I. Value-added theory } & \text { U. Public } & \text { GG. Narm-oriented movernerts } \\\hline \text { J. Emergency dispersals } & \begin{array} { l } \text { V. Mass hysteria (or contagion) } \\\text { theary }\end{array} & \text { HH. Contagious mental urity } \\\hline \text { K. Coerced dispersals } & \text { W. Mass } & \text { II. Differential expression } \\\hline \text { L. Routine dispersal } & \text { X. Emergent nomn theory } & \text { JJ. Perception control theary } \\\hline\end{array}$$
-_____ When some actors can reap the benefits of a group effort without incurring the costs.