Courtney admits there is a difference in the effort she puts forth during a group project versus the effort she shows when the project is assigned individually. Specifically, she shows less effort during the group project. Courtney's behavior can be attributed to

A. compliance.
B. laziness.
C. social facilitation.
D. social loafing.

D. social loafing.

Explanation:

Social loafing: In psychology, the term "social loafing" was proposed by Max Ringelman during the 1890s, and is described as a phenomenon in which an individual tends to exert less attempt or effort on a particular task if he or she is being involved in a group instead when he or she works alone. However, working with a specific group might improve the performance of a person by pooling the skills involved.

In the question above, Courtney's behavior can be attributed to social loafing.

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.