Without Working Out All the Structures, Which Has the Larger

Without working out all the structures, which has the larger number of structural isomers, C₁₄H₃₀ or C₁₅H₃₂?

A) C₁₄H₃₀
B) C₁₅H₃₂
C) They have the same number of isomers.
D) There is no way to tell without working out all the structures.
E) It depends on the number of multiple bonds in the molecule.