Based on the Results of Van Zelst's Study of Bricklayers

Multiple Choice

Based on the results of Van Zelst's study of bricklayers and carpenters, one might infer that a team of construction workers would be most productive when

A) they are of different genders.
B) they are from different socio-economic status.
C) they like each other.
D) the most productive workers receive most pay.