A merchant visits a sales center to quote prices for the products they wish to buy. They verify that 100\% of the quantity acquired of type A products is used, but only 90\% of type B products. This merchant wishes to buy a quantity of products, obtaining the lowest cost/benefit in each one. The table shows the price per kilogram, in reals, of each product traded.
| Product | Type A | Type B |
| Rice | 2.00 | 1.70 |
| Beans | 4.50 | 4.10 |
| Soy | 3.80 | 3.50 |
| Corn | 6.00 | 5.30 |
The types of rice, beans, soy and corn that should be chosen by the merchant are, respectively,
(A) $\mathrm{A}, \mathrm{A}, \mathrm{A}, \mathrm{A}$. (B) $\mathrm{A}, \mathrm{B}, \mathrm{A}, \mathrm{B}$. (C) $\mathrm{A}, \mathrm{B}, \mathrm{B}, \mathrm{A}$. (D) $\mathrm{B}, \mathrm{A}, \mathrm{A}, \mathrm{B}$. (E) $\mathrm{B}, \mathrm{B}, \mathrm{B}, \mathrm{B}$.