Which equation represents this problem? The time it takes Tomás to bike to the community center is 2 minutes less than half the time it takes him to bike to the city park. It takes Tomas 18 minutes to bike to the community center. Let p = the time it takes Tomas to bike to the park

A:2p+1/2=18
B:1/2p+2=18
C:2p-1/2=18
D:1/2p-2=18