When a product is bought from the supermarket, the contract is usually formed:

Question $11$Answer

a$.$

when the customer lifts the product off the shelf and puts the product into the basket.

b$.$

when the customer takes the product to the cashier and offers payment.

c$.$

when the customer holds onto the product for more than twenty minutes preventing other customers from buying that product.

d$.$

when the cashier accepts payment for the product.