Which of the Following Statements About the Reactions of Alkynes $\pi$

Which of the following statements about the reactions of alkynes is not true?

A) Alkynes contain easily broken $\pi$ bonds.
B) Alkynes undergo addition reactions.
C) When alkynes undergo two sequential addition reactions, four new $\sigma$ bonds are formed.
D) When alkynes undergo two sequential addition reactions, two new $\sigma$ bonds and a $\pi$ bond are formed.