Which of the Following Statements Is TRUE

Which of the following statements is TRUE?

A) H-X molecules add across C=C bonds with retention of absolute configuration.
B) The addition of H-X molecules to alkenes and alkynes is a one-step mechanism.
C) The rate of H-X addition depends strongly on the nature of the leaving group.
D) According to Markovnikov's rule, the hydrogen cation adds to the C=C bond in such a way as to generate the most stable carbocation.
E) The hydrogen cation adds to the more substituted carbon atom of the C=C bond, a fact known as the Markovnikov's rule.