Let $\mathrm{U}$ Be the Smallest Possible Universal Set That Includes All of All

Let $\mathrm{U}$ be the smallest possible universal set that includes all of the crops listed; and let $\mathrm{A}, \mathrm{K}$ , and $\mathrm{L}$ be the sets of five crops in Alabama, Arkansas, and Louisiana, respectively. Find the indicated set.
- $\mathrm{L} \cap \mathrm{K}$

A) $\{\mathrm{c}, \mathrm{n}, \mathrm{r}, \mathrm{s}, \mathrm{t}\}$
B) $\{c, h, n, w\}$
C) $\{\mathrm{r}, \mathrm{s}, \mathrm{t}\}$
D) $\{c, h, n, r, s, t, w\}$