Why was Mecca a major trade center?

If you lived in greece in about 300b. c. you had a good chance of witnessing which of the following? select all that apply

What are the 6 steps in the scientific method

In 1816, john c. calhoun proposed that: a. that the federal government aid in the construction of roads and canals to improve transportation to and from the west b. the united states should end slavery. c. the united states should increasing the size of the navy and invade central america. d. the united states should annex hawaii