Christina wrote this expression to describe the amount of money she has.

10 × y

Which situation could be described by this expression?

A.
Christina only has dimes, but she does not know how many dimes she has.

B.
Christina only has quarters, but she does not know how many quarters she has.

C.
Christina only has nickels, but she does not know how many nickels she has.

D.
Christina only has pennies, but she does not know how many pennies she has.