The new immigrants spoke English so it will be A
There are a number of checks.
The two most important are the House's ability, along with the Senate, to override the President's veto.
Additionally, the House has the power to draw up Articles of Impeachment if it is believed that the President has acted inappropriately.
Five factors that spurred industrial growth in the late 1800's are Abundant natural resources (coal, iron, oil); Abundant labor supply; Railroads; Labor saving technological advances (new patents) and Pro-Business government policies.
He brought the Songhai Empire to its height of power and founded the Askia Dynasty. Askia Muhammad was a devout Muslim. Under his rule, Islam became an important part of the empire. He conquered much of the surrounding lands and took control of the gold and salt trade from the Mali Empire.