The best answer to go with is b
A vertical<span> market is a market where people offer goods and services to specific companies, </span>trade<span>, professions, or other group of customers with specialized needs. </span>
I believe it is the first answer
hope this helps
Hecateaus geography is different from Homer in the sence that he wrote on the description of the earth.
Easterlies, westerlies, and the trade winds