Alonzo offered to sell to Bernardo a parcel of land at a specified price. Alonzo gave Bernardo (60) days within which to accept the offer. Bernardo agreed to the period.

• A. Before the lapse of sixty days, Alonzo may withdraw the offer or increase the price.
• B. Before the lapse of sixty days no withdrawal can be made but the price may be increased.
• C. No withdrawal can be made before sixty days because the period is binding.
• D. No withdrawal can be made because there is already a perfected option contract.