QUESTION $18$ shown as $($Store $1,$ Store $2).$

Refer to the table. What is the Nash Equilibrium of this price$-$setting game?

a$.$ Grocery store $1$: High price Grocery store $2$ : High price

b$.$ Grocery store $1$: High price Grocery store $2$: Low price

c$.$ Grocery store $1$: Low price Grocery store $2$: High price

d$.$ Grocery store $1$: Low price Grocery store $2$: Low price