[Vocabulary] Remains vs Remainder

[thienan123456]

Can you please tell me the difference between remains and remainder?

And the answer this question is what?

Only thoroughly unpleasant people leave the ……… of their picnics to spoil the appearance of the
countryside.
A. rest B. remainder C. remains D. rester

Thanks in advance.

 

[J&K Tutoring]

IMO, a remainder is some useful portion left over.
I suggest you use the remainder of your time for some reading.
Subtract three from five and the remainder is two.

The word for the situation in your example is remains.