Answer: a. Competition
Explanation:
The basic premise of the Capitalist economic system is competition. Firms need to compete amongst themselves to be able to sell more to people as well as to make the most profit.
The biggest advantage of competition in capitalism is that it forces companies to become efficient as they try by all means to produce at the lowest cost while still maintaining enough product quality that the customers will still love their brand.
It is therefore good for consumers as well because apart from providing them with good quality theoretically, the consumers get lower prices as well.
