Final answer:
The contract described can be categorized as a real estate contract. Buyer A signs the agreement to purchase Seller B's house and needs to obtain financing before proceeding with the purchase.
Step-by-step explanation:
The contract described in the question can be categorized as a real estate contract. A real estate contract is an agreement between a buyer and a seller for the purchase and sale of a property, in this case, Seller B's house.
Buyer A signing the agreement to purchase the house indicates their intention to buy the property, but they need to obtain financing before proceeding with the purchase. This is a common condition in real estate contracts, ensuring that the buyer has the necessary funds to complete the transaction.
Once Buyer A secures the financing, they can proceed with the purchase of the house according to the terms and conditions outlined in the contract.