Aries is a new company in the laundry detergent market, which already has many competitors. Researchers at Aries have devised a new, cost$-$efficient formula for manufacturing detergents that has made it possible for the company to charge less than its competitors and still make a profit. The strategy used by Aries is that of $\_\_\_\_\_.$

Group of answer choices

a$.$ Cost leadership.

b$.$ Stuck$-$in$-$the$-$middle.

c$.$ Withdrawal strategy.

d$.$ Differentiation.

e$.$ Change strategy.