First-time buyer Ty Roe saw an online listing for Verdant Acres, a five-bedroom ranch house, in the Inland Empire. The property was listed for $750,000, which Ty considered a steal. Ty immediately contacted the listing real estate broker Ima Fast Talker, of Provincial Realty and accepted the offer as stated in Provincial Realtys listing of Verdant Acres. Which of the following is true concerning the legal effect of Provincial Realtys online listing of Verdant Acres?

a. Tys acceptance is ineffective legally, because Provincial Realtys online listing is only an invitation to offer.

b. Tys acceptance is ineffective legally, because Provincial Realtys online listing is online; California law requires a listing to be in writing.

c. Tys acceptance is effective legally, because Provincial Realtys online listing is an offer.

d. Tys acceptance is effective legally, but actually is a counteroffer to Provincial Realtys online listing/offer.