Andrew Cherng was born in China and immigrated to the U$.$S$.$ to go to college. With his Myanmar$-$born wife Peggy, they opened their first Panda Express fast$-$food restaurant, which grew into a chain with more than $2,000$ restaurants worldwide. Their story is illustrative of the fact that one out of every $\_\_\_\_\_\_\_$ U$.$S$.$ businesses is owned by an immigrant.

Group of answer choices

ten

six

$12$

four

$20$