Which city was the starting point for all the explorations?

St. Louis.

Explanation:

Beginning at St. Louis, Missouri, the expedition travelled up the Missouri River to the Great Divide, and then down the Columbia River to the Pacific Ocean.

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the hollywood film industry of 1950 was threatened on several different fronts. television broadcasting was rapidly becoming the dominant entertainment medium in the united states. the paramount anti-trust consent decree requiring separate ownership for production companies and theater chains had gone into effect on 1 january 1950. large numbers of young men and women were marrying, having children, and moving to the suburbs, which affected the viability of downtown first-run movie theaters. foreign revenues were endangered by protectionist tactics including quota systems, high taxes, and blocked funds. finally, the morality and patriotism of hollywood films and filmmakers were under attack from government, religious, and citizens' groups.

explanation:

the correct answer is a: slaves from other colonies ran away to georgia.