at the time the French controlled the middle part of North America the most important use of the Mississippi River and its tributaries was for

a)fishing
b)transportation
c)natural boundary
d)hydroelectric power
e)irrigation

i put b

Right.

thanks Ms Sue

You're welcome, Alana.

Correct! The most important use of the Mississippi River and its tributaries during the time when the French controlled the middle part of North America was transportation.

To arrive at this answer, you can eliminate options that are unlikely during that time period. Hydroelectric power and irrigation were not significant uses of rivers in that era. Fishing may have been important, but transportation was often a critical factor in economic development and empire building. A natural boundary is not a use of the river, but rather a geographical function. Therefore, transportation remains as the most plausible and significant use of the Mississippi River and its tributaries during French control.