Asecondary group is characterized by
a. members who are not interchangeable.
b. intimate relationships.
c. a limited number of members.
d. instrumental relationships.

(D) instrumental relationships

Explanation:

A group is defined as collection of humans that share certain characteristics and interact with one another

A primary group is typically a small social group whose members share close, personal and enduring relationships. e.g. family

However, a Secondary group is a large group whose relationships are often impersonal and goal oriented. Their relationships are temporary. e.g A cooperative society

the arab empire adopted the muslim religion as their main belief. arabs would influence the people from the territories they invaded towards islam (the muslim belief).

nevertheless, throughout the history of the arab empire, rulers brought intellectual individuals from other religions to their centers of learning. these other foreigners included jews, christians, greeks, persians, and indians.   these resulted in the adoption of important knowledge developed by these cultures by the arabic empire. for example, the works of aristotle were translated from greek to arab and indian scientists brought the numerical concept of "zero" to the arabs.

nowadays, 93% of the arab population is muslim, which at the same time is subdivided in sects including the sunni, zaini, alawi, shia. the remaining 7% is composed mainly of christians.