Question

regiment means :
an assortment of things from which a choice can be made
a group of people or things arranged or following in order
a collection of things for public display
army unit smaller than a division

Explanation:

The word "regiment" in a military - context refers to an army unit that is smaller than a division. It is a well - defined military term. The other options do not accurately define "regiment".

Answer:

D. army unit smaller than a division