Differences among members of the workforce -- such as age, gender and national origin -- are characteristics of:

A) management challenges.
B) workforce diversity.
C) organisational gaps.
D) economic barriers for workforce development.
E) cultural similarities.

Differences among members of the workforce, such as age, gender, and national origin, are characteristics of workforce diversity. This concept refers to the variety of differences between people in an organization, encompassing how they identify in terms of race, gender, ethnicity, age, sexual orientation, and other factors.