Read the dialogue and answer the question.
Lara: Hi, Emre. Do you want to join our tree planting project on Sunday?
Emre: I'd love to, but I have a chess tournament. What about Saturday?
Lara: Saturday is fine. We are meeting at the City Park at 9 a.m.
Emre: Great! See you then.
According to the conversation, why can't Emre join the project on Sunday?
A)Because he has a chess tournament.
B)Because he wants to go shopping on Sunday.
C)Because he doesn't like planting trees.
D)Because the meeting is at the City Park.