A homeowner offers a painter $5,000 to paint her house, stating the offer can be accepted only by completing the job. The painter finishes half the house when the homeowner attempts to revoke. What is the painter's best argument that revocation is ineffective?
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A
Beginning performance of a unilateral contract makes the offer irrevocable as an option
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B
Part performance constitutes full acceptance of the contract
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C
The offer was supported by consideration and cannot be revoked
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D
Revocation of any offer requires written notice