Answer: C
Step-by-step explanation:
[tex]Formula: V=\pi r^2h[/tex]
We do not have the radius, but we do have the diameter. A diameter is twice the radius, therefore we can divide the diameter by 2 in order to obtain the radius.
[tex]\frac{d}{2}=\frac{12}{2} =6[/tex]
Plug this info into the formula.
[tex]V=\pi r^2h\\V=\pi (6)^2(7)\\V=\pi 36*7\\V=252\pi in^3[/tex]