The answer is probably C. gustan is in plural which matches up with the rest of the sentence
Nositros no / llegar al centro comercial
-Nocotros no sabemos llegar a la residencia estudiantil
yo / el profesor de literatura
-Yo conozco al profesor de literatura
Elena y Maria Victoria / patinar en linea
-Elena y Maria Victoria saben patinar en linea
(Hope this helps although I don't know if they are correct)
Good luck.
Answer: Tengo el pan y la lechuga.
Explanation: because it says you have lettuce and bread