Question 1 & explain correct answer please

When the seller lacks knowledge of an item on the property condition disclosure, the listing agent should

A - provide an implied warranty instead.

B - waive all inspections.

C - complete the form for the client.

D - notify the buyer's agent.

Question 2 & explain correct answer please

Buyer Jim signs a purchase contract at the asking price with no contingencies and the 30-day closing date as specified by the seller. Seller Tom changes the contract closing date of 40 days and signed the contract. This contract, in its present form, is:

A - Valid with the 30-day closing date, since Buyer Jim met all the terms as originally specified by the seller

B - Valid with the 40-day closing date, since a 10-day extension is not considered material to the contract

C - Invalid since the signed documents do not yet indicated mutually agreed-upon terms

D - Enforceable, since the seller has provided a valid counter-offer