The lower stability of ethyl anion compared to methyl anion and the higher stability of ethyl radical compared to methyl radical, respectively, are due to

Options

A. +I-effect of the methyl group in ethyl anion and `sigma rightarrow `p-orbital conjugation in ethyl radical
B. -I-effect of the methyl group in ethyl anion and `sigma rightarrow sigma^star` p-conjugation in ethyl radical
C. + I effect of the methyl group in both cases
D. + I-effect of the methyl group in ethyl anion and `sigma rightarrow sigma^star` conjugation in ethyl radical.