Answer:
The correct answer is letter "D": simultaneously compete against each other in the same product areas geographic markets.
Explanation:
Multi-market competition happens when companies offering a similar product make contact in multiple markets. The level o competition shapes according to the region where the goods or services are being offered and in different markets, different consumers decide which company is taken as the preferred.
Though, the constant contact of competitors in different regions could decrease their competition since they might use their mutual help in adverse areas to be able to conduct their businesses.