What is the name of the following compound?
$\table , , H, -, C, -, H, , , ; , , , , ∣∣, , , ,; H_3C , -, CH_2, -, C, -, CH_2, -, CH_2, - CH_3;$

• A.3-methylhexane
• B.2-propyl-1-butane
• C.2-ethyl-1-pentene
• D.4-ethyl-4-pentene