What is having people conform with the customs, attitudes etc of an existing group?

Cultural Integration

Explanation:

The definition of "integrate" is "bring (people or groups with particular characteristics or needs) into equal participation in or membership of a social group or institution." The customs and attitudes of an existing group could be described as that group's culture, so it would be called "cultural integration."

an effect of the steamboat's popularity was that people began building canals in the united states and europe. this was done to find another way to transport goods across the country and in that time, transportation using the river was very slow and dangerous. it depended entirely on manpower and the current of the river. that all changed in the late 1700's when steamboats were introduced. they soon revolutionized travel and trade through the river and dominated the waterways. eventually, other means of transportation took over from the steamboats, but there was a time that they the united states to expand to the west.

the answer is a. 250 percent.