Based on the excerpt, in what way did Islam help unify Arabia?

Which one of the following statements best characterizes change to agriculture in the united states since 1900

How did the supreme court change as a result of ronald reagan's presidency? answers?

Ineed asap! ! what is the name of the system in which each branch of the u.s government can limit the actions of the other branches? a. perpetual union b. division of powers c. cooperative federalism d. checks and balances