Why is it credit? What does this mean?

[Luosa]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #559 "English Slang Idioms (197)", question 4

"Your ability to maintain your bearing, position and poise in the face of criticism and rude behavior does you .........," his boss told him.

(a) service
(b) credit
(c) reputation
(d) stature

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #559 "English Slang Idioms (197)", answer 4

"Your ability to maintain your bearing, position and poise in the face of criticism and rude behavior does you credit," his boss told him.

Correct answer: (b) credit
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why is it credit?what does this mean?

Luosa

[Linda]

Credit in this case means: "Recognition or approval for an act, ability, or quality: Example: 'gave them credit for a job well done.'"
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