On his 27th birthday, Bert agreed to buy a computer from Computer World, a local retailer. Which choice has a missing necessary element for a contract? (Read each separately.)

a.The written sales agreement describes the model number of the computer, its principal features, a requirement that Bert will pay a reasonable price and a provision for a one-year warranty.

b.The sales agreement specified the price and features of the computer including the model number, but failed to mention some optional features that Bert did not want in any event.

c.The sales representative for Computer World stated orally the price, model number and features of the computer including delivery date.

d.Bert forgot to initial the written agreement when he agreed to buy the computer although the sales representative signed the document and the document described the price and features of the computer.

e.The agreement between Bert and Computer World did not include a warranty for parts but did include labour.