Consider the following alkenes:

Arrange them in order of increasing stability. Justify your order.

• A. iv < iii < v < i < iiiThe ranking is based on the number and positions of hydrogens around the double bond.
• B. ii < iii < v < i < ivThe ranking is based on the number and positions of the substituents around the double bond.
• C. ii < i < v < iii < ivThe ranking is based on the number and positions of hydrogens around the double bond.
• D. iv < i < v < iii < iiThe ranking is based on the number and positions of the substituents around the double bond.

Answer: (D)