Which Is the Correct Name for the Molecule Depicted Below

Which is the correct name for the molecule depicted below?

A) 1,2-diethyl-1-methyl-3-propyl-4-isobutylhexane
B) 1,6,6-trimethyl-1,2,4-triethyl-3-propylhexane
C) 1,1,6-trimethyl-3,5,6-triethyl-4-propylhexane
D) 4,6-diethyl-2,7-dimethyl-5-propylnonane
E) 3,5-diethyl-1,1,6-trimethyl-4-propyloctane