The C - C - C Bond Angles in Octane $\circ$

The C - C - C bond angles in octane (CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₃) are ________

A) 180 ^$\circ$ .
B) 120 ^$\circ$ .
C) 90 ^$\circ$ .
D) 109.5 ^$\circ$ .
E) 60 ^$\circ$ .