What is 'some rolls'?

[Roni]

English Grammar Tests, Elementary Level

ESL/EFL Test #99 "a, some or any", question 10

We need to buy ......... rolls if you want to make hotdogs for your lunch.

(a) a
(b) some
(c) any

English Grammar Tests, Elementary Level

ESL/EFL Test #99 "a, some or any", answer 10

We need to buy some rolls if you want to make hotdogs for your lunch.

Correct answer: (b) some
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what is roll?

[Mister Micawber]

.
Here, roll = small rounded bread, either plain or sweet.
.
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Native English teacher at Mister Micawber's