A Single Carbon Branch Within a Hydrocarbon Is Referred to as a Methyl

Multiple Choice

A single carbon branch within a hydrocarbon is referred to as a methyl group, while a two carbon branch is referred to as an ethyl group. What then is the formal name for the structure shown below?

A) 3-methyl-4-ethyl-6-methyloctane
B) 3,6-dimethyl-4-ethyloctane
C) 2-ethyl-4-ethyl-5-methylheptane
D) 2,4-diethyl-5-methylheptane