What Is a Correct Method for Determining the Number of Atoms

What is a correct method for determining the number of atoms in a body-centered cubic cell?

A) $\# \text { atoms }=\frac{1}{8}(8) +1$
B) $\# \text { atoms }=\frac{1}{8}(8) +\frac{1}{2}(4)$
C) $\# \text { atoms }=\frac{1}{8}(8) +\frac{1}{2}(6)$
D) $\# \text { atoms }=\frac{1}{4}(8) +\frac{1}{2}(6)$
E) $\# \text { atoms }=\frac{1}{4}(8) +\frac{1}{2}(4)$