Question $6($Mandatory$)(2$ points$)$

When a customer asks a merchant to deliver an article to his home with no mention of payment, the buyer implies that he or she will pay the market price of the article when it is delivered or when the Jbill is presented. This is an illustration of $a(n)$ :

a$)$ simple contract.

b$)$ consideration.

c$)$ implied contract.

d$)$ formal contract.