Answer:
Correct answer is b. Grand Canyon .
Step-by-step explanation:
B is the correct option, as Coronado together with his men discovered Grand Canyon in 1540.
A is not correct answer as the first explorer who used this term was Álvar Núñez Cabeza de Vaca.
C is not correct as Hernando de Soto was the first European to reach Mississippi.
D is not correct as French explorer were among the first to reach this area.