The correct answers for this completion exercise are the option "B" and the option "C":
B. cm³
C. cc
This means that you can write the unit of volume (or capacity) cm³ as cc.
Therefore, cm³=cc
For example, you have:
a) 10 cm³=10 cc
b) 110 cc=110 cm³
c) 1 litre (l)=1000 cm³
d) 1 litre (l)=1000 cc