Which two geographic features are connected by the Ohio River?

Monopolies were legal in the united states until a)the 1860s. b)the 1870s. c)the 1880s. d)the 1890s.

What was the purpose of the u.s navy's convoy system

June 19 is often a holiday in texas. it is emancipation day. what important event happened on emancipation day? a) it marks the end of slavery in texas. b) it marks end of the texas revolution. c) it marks the day texas became a state. d) it marks the last battle of the texas revolution.