Robert de la salle is noted for
a. finding the northwest passage.
b. exploring the st. lawrence river.
c. claiming for france the land around the mississippi river.
d. leading a jesuit mission in new france
i think the answer is a

Actually, what I know of it, is that he explored the regions of Great Lakes and the Mississippi River, and that he claimed the region around Mississippi for France - I think that the best answer is C.

Robert de La Salle is a French explorer and well known for claiming the land around the Mississippi river for France. It was noted in history that he claimed the area for France by burying an engraved cross and plate at the mouth of the Mississippi river. La Louisiane was the name he gave for the Mississippi basin, after the great King Louis XIV.