Broker K arrives to present an offer to Mrs. G, an invalid, and finds her son and his wife also present. Both individuals persistently urge Mrs. G to accept the offer on her home, though it is much lower than the price she was asking. If Mrs. G signs the offer, she may later claim:

that Broker K should not have brought her a low offer

that she was under undo duress from her son and daughter-in-law and that the agreement is voidable

that Broker K defrauded her by allowing her son and daughter-in-law to see the agreement

that her son and his wife have usurped her consumer protection rights
A: that she was under undo duress from her son and daughter-in-law and that the agreement is voidable

Because she is an invalid, and her son and daughter-in-law persisted in their efforts to have Mrs. G sign the terms of the contract. (Under duress)

As per the given description, Mrs. G may claim later(if she signs the offer 'that she was under undue duress from her son and daughter-in-law and that the agreement is voidable' as she was under persistent enforcement or imposition to accept the offer(persistently urge Mrs. G to accept the offer on her home). Since the price they are offering to her is much lower in comparison to the price that she is asking, she can claim that she was under undue duress/compulsion to accept the offer which makes the agreement revocable. Therefore, option B is the correct answer.