Allison is a music therapist at a nursing home. She loves basketball, so each March during tournament time, she invites her coworkers to draw team names from a hat. Whoever draws the winning team gets to sign a giant, inflatable basketball and gets bragging rights for the year. In terms of Bolman and Deal's human resources framework, this situation represents $\_\_\_\_\_\_\_.$

a$.$ a norm

b$.$ staff development

c$.$ an informal role

d$.$ a clique