The correct answer is A) a decrease in profit.
Increased competition between producers of a good may lead to a decrease in profit.
This is true because when there are two or more competitors that are producing the same product or offering the same service, the result would be that the margin of profit could be reduced in order for one company to maintain its consumers through the offering of better prices or more attractive promotions than their competitors. Of course, this situation directly benefits consumers in a market economy because they will have good quality products at a very competitive or attractive price.
