Even though there is increasing diversity in the workplace, women and ethnic minorities experience difficulty in breaking thru the an invisible barrier to career advancement.

The Glass ceiling.

Explanation:

This concept is a metaphor, referring to the difficulties a minority group can experience when trying to rise beyond some levels within any organization. For instance, in a male-dominated hierarchy within a company, a woman may find obstacles to rise to managerial or executive levels.

This will be caused more by implicit and unwritten biases, than because of official company policies.

1) d

2)c

3)b

4) a

5)c

6) c

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.