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