Fallon agreed in writing to purchase a used truck from Moonlit Motors with the understanding that a snowplow attachment would be added. When Fallon attempted to take delivery of the truck, he found that the plow attachment had not been added. He refused to accept delivery. Moonlit protested that the plow attachment was being shipped from Minnesota and that it would be installed when it arrived. Moonlit demanded that Fallon accept the truck. a. Can Fallon legally refuse to accept the truck? b. Is this an example of a condition precedent? c. Is the contract enforceable?