Answer and explanation

Correct answer: C. sweets, snacks

「おかし」 means sweets, snacks.
Answer: sweets, snacks.
Why not the others: souvenir: that is the meaning of 「おみやげ」. key: that is the meaning of 「かぎ」. change (money): that is the meaning of 「おつり」.

Practise more Everyday words.

Free questions with an explanation for every one, and full timed JLPT Practice (N5 and N4) - Japan mock tests.