Ok, in the examples on non-countable items, the English translation uses "some". E.g. Il achete du pain. He buys some bread. Similar question in the

Question

Similar question in the quiz (instead a female buying coffee), but when I chose the "some" option (she buys some coffee), I was not granted the score. That's contradictory and confusing. Which is it? With the "some", or without?

Accepted Answer

They are both possible - you have to select both options to be marked correct. 
Normally there is a hint that 1 or more answers can be correct, but perhaps it was missing in this question. However, any time you have to select answers by ticking a checkbox next to them, you can assume that more than one answer could be correct - and usually there will be more than one.

Answer

FYI: that type of answers guide you to be able to convert your thoughts as English speaker to french easily (because you might say any of these two phrases in English which leads you to the same french phrase.