A resource histogram includes which 2 data points ?

A. Resource and time estimate

B. Resource and calendar date

C. Activity and resource

D. Resource and usage

Answer : D

As per my understanding of the definition of Resource Histogram, the answer to this should be B. Resource and calendar date seems to be the best answer.

Any idea why D has been suggested as the correct answer to this question. I found this question and the answer on a free online test .