Will mark as !
the explorations of marquette, jolliet, and la salle
a new france to expand.
b resulted in a better route to asia.
c opened territory along the hudson river.
d reduced the size of new netherland.

Explanation:

These explorer helped to the expansion of New France. Jacques Marquette is known as the first European to see Mississippi River. Then, Louis Jolliet took a trip trough Mississippi River to explore its origins. And La Salle, explored the outlet of Mississippi River to the Gulf of Mexico.

So, these three contributed to exploration in New France around the Mississippi River.

c it says nothing about connecting those 2 seas.

which

like dude you only explained

the problem not the