Difference between success and progress

[Rich7]

Test No. incompl/advan-24 "Employment and Training", question 7

The head of department acknowledged that the ......... of the section was largely due to high quality support staff.

(a) success
(b) progress
(c) business
(d) future

Test No. incompl/advan-24 "Employment and Training", answer 7

The head of department acknowledged that the success of the section was largely due to high quality support staff.

Correct answer: (a) success

Your answer was: incorrect
The head of department acknowledged that the progress of the section was largely due to high quality support staff.
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help me grasp the concept here?

[Alan]

This word would be too vague here because it is not clear enough what sort of progress it would be and where it has gone. Success is more appropriate.
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