Answer:
B. For the print cartridge company, because its revocation latter was received by the business owner before she dispatched the acceptance letter.
Explanation:
The print cartridge company had issue a business offer to customers for a free premium printers if they buy cartridges from them. The print cartridge company should have communicated that this is limited time offer or offer is valid till stock lasts. The company can still have option to revoke its offer but it should communicate to all its customers whom they have sent this offer. The business owner has received mail before she had provided the acceptance.