Hydrogenation of Double and Triple Bonds Is an Important Industrial $\Delta$

Hydrogenation of double and triple bonds is an important industrial process. Calculate (in kJ) the standard enthalpy change $\Delta$ H° for the hydrogenation of ethyne (acetylene) to ethane.

A) -296 kJ
B) -51 kJ
C) 51 kJ
D) 296 kJ
E) 381 kJ