Mr. Seller offered to sell to Mr. Buyer, a parcel of land for P5 million. Because the latter could not make up his mind, Mr. Seller gave him thirty (30) days within which to decide.

• A. Seller may always withdraw the offer before 30 days.
• B. Seller can withdraw the offer prior to acceptance by Mr. Buyer.
• C. Seller cannot withdraw before the lapse of 30 days.
• D. Answer is not given.