Consider a Capacitor That Consists of Two Parallel Plates,one of Which

Consider a capacitor that consists of two parallel plates,one of which can move relative to the other.Air fills the space between the plates,the capacitance is 25.0 pF when the separation between plates is d = 0.450 cm.A battery with potential difference V=11.1 V is connected to the plates.What is the charge density $\sigma$ on the left plate?

A) 1.1 * 10^-8 C/m²
B) 2.2 * 10^-8 C/m²
C) 3.3 * 10^-8 C/m²
D) 4.4 * 10^-8 C/m²
E) 6.3 * 10^-8 C/m²