How did innovations in engineering most contribute to the lasting survival of the Roman Empire? They helped the empire create alliances.
They helped the empire spread its culture.
They helped the empire expand its territory.
They helped the empire build a stronger military.

help! quickly! i have 10 mins left :l

Who was saul? explain his relationship to david and the importance of david to both christians and jews.

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.

Which of the four planes was hijacked first? a.flight 175 b.flight 77 c.flight 11 d.flight 93