Answer:
correct option is b. are not covered under the Robinson-Patman Act.
Step-by-step explanation:
given data
charges deliveries for one-time customers = $4.00
charges deliveries for account customers = $2.00
solution
we know that Robinson-Patman Act it is required that when business is sell its product at same price,
and this law prevent the distributor by charge different price to the various retailer
so here this law are not covered under the Robinson-Patman Act
so correct option is b. are not covered under the Robinson-Patman Act.