Question

Choose the correct translation for "He sings better than he plays." 

       A. Canta mejor que toca.   B. Canta mejor que prueba.   C. Canta peor que toca.   D. Toca mejor que canta.

Answer 1

The correct translations for " He sings better than he plays" would be canta mejor que toca (option A) As it is a comparison in which he sings (canta) better (mejor) than he plays (toca). 
Option B would not apply because the 2nd verb is not "play" but "try."
option C and D present the comparison with the adjective Worse which means peor and D also presents the verbs in different order, 

Answer 2

could be more then one, I speak Italian and it seems to me (Obras de teatro)