Answer:
It depends on what you mean by correct because A, B, and C are all grammatically correct, but only A. and B. make logical sense.
Explanation:
(A) Usted, señor Matt, preparas el comedor. = You, Mr. Matt, prepare the dining room.
(B) Soy Eduardo; yo barre la sala. = I am Eduardo; I sweep the room.
(C) Usted, señor Matt, preparo el comedor. = You, Mr. Matt, prepared the dining room.
(D) Soy Eduardo; yo barro la sala. = I am Eduardo; I mud the room.
