Determine Which Is the Better Buy $\$ 3.52,10$ Batteries For $\$ 8.55$

Determine which is the better buy.
-4 batteries for $\$ 3.52,10$ batteries for $\$ 8.55$ , or 25 batteries for $\$ 20.61$

A) 4 batteries
B) 10 batteries
C) 25 batteries