Meaning of suitably depressed

Test No. [color=blue]incompl/inter-86 “Simple Present (3)”, question 3

Everyone in the pub looks depressed at this remark and begins to think of all the price increases that will follow.

(a) ideally
(b) conveniently
(c) suitably
(d) easily

Test No. [color=blue]incompl/inter-86 “Simple Present (3)”, answer 3

Everyone in the pub looks suitably depressed at this remark and begins to think of all the price increases that will follow.

Correct answer: (c) suitably

Your answer was: [color=red]incorrect
Everyone in the pub looks easily depressed at this remark and begins to think of all the price increases that will follow.
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what is the meaning of "suitably depressed?

They all looked miserable, which was appropriate/suitable to the news that they had been given. In other words it means depressed/unhappy in line with what you would expect.

They had been given, right?

Yes, typo now corrected.