Which of the Following Statements Describes the Reactivity of Alkynes

Which of the following statements describes the reactivity of alkynes?

A) An alkyne is an electron-rich molecule and therefore reacts as a nucleophile.
B) The σ bonds of alkynes are greater in energy than the π bonds and, therefore, are more reactive.
C) Unlike alkenes, alkynes fail to undergo electrophilic addition reactions.
D) When a symmetrical internal alkyne reacts with HBr, two products are formed.
E) Alkynes react as electrophiles, whereas alkenes react as nucleophiles.