The Molecule Shown Is Named as a Substituted ________ Because

The molecule shown is named as a substituted ________ because ________.

A) decane; it contains 10 atoms of carbon.
B) hexane; it contains six atoms of carbon in its longest chain.
C) tetramethane; it contains four methyl groups as branches.
D) hexamethane; it contains six methyl groups altogether.
E) butane; four carbons are substituted onto the chain.