Franklin Offered to Sell His Text Book to Delia for $40.00

Multiple Choice

Franklin offered to sell his text book to Delia for $40.00 and told her he wanted an answer by Friday. Which of the following must Delia do to ensure that Franklin will have the book on Friday afternoon if she decides to buy it?

A) Confirm the arrangement with Franklin to make sure they both understand it is to be kept open until Friday.
B) Have Franklin commit his offer by writing it on paper and signing it.
C) Give Franklin something to keep the offer open until Friday.
D) Commit to a specific time and place at which to meet Franklin to give him an answer.
E) Have Franklin repeat his offer before a witness.