1. (a) That's right. Conversion consists of intentionally exercising control of goods to deny another person's right of possession. Conversion involves a person 'converting' another's goods to their own use, such as when a finder of goods keeps or sells those goods instead of returning them to the owner. Merely damaging, moving or interfering with goods is not conversion although it may be a trespass. There is no conversion unless the person does something to assume ownership or possession of the goods.
The purchaser of identified goods in a deliverable state normally becomes the owner of those goods as soon as the terms of the sale are agreed. B thus became the owner of the freezer, entitled to delivery. A's act of reselling and delivering it to C is clearly intended as a denial of B's rights to possess his goods. B is correct to assert conversion against A.