He made the secret police
I'm pretty sure the answer is C he built a steam boat called the North River steamboat also known as the Clermont.
Answer:The Revolution had contradictory effects on slavery. The northern states either abolished the institution outright or adopted gradual emancipation schemes. The Revolution also inspired African-American resistance against slavery. During the Revolution, thousands of slaves obtained their freedom by running away.
Explanation:
ANSWER: The tank was developed as a means to break the stalemate on the Western Front in World War I. Military technology of the time favored the defense. Even if an attack did succeed, it was almost impossible to exploit the breach before the enemy rushed in reinforcements to stabilize the front.
EXPLANATION: HOPE THIS HELPS!