When a firm sells a good or a service the sale contributes tothe nations income

When a firm sells a good or a service the sale contributes tothe nations income __________.A. only if the buyer of the good or service is ahousehold or another firm B. only if the buyer of thegood or service is a household C. We have to knowwhether the item being sold is a good or a service in order toanswer the questionD. whether the buyer of the good or a service is ahousehold another firm or the government