Moving Company contracts with Tenant to box and move all of Tenants possessions for $300. Moving Companys contract contains a clause stating that Moving Company reserves the right to cancel the contract at any time without being liable. Is this a valid contract?

A. Yes. Moving Company had a pre-existing duty to move Tenant's items.

B. No. The contract fails for want of consideration.

C. No. Moving Company did not have a pre-existing duty to move Tenants items.

D. Yes. The contract contains valid consideration.