Based on historical perspective, the two main reasons King Louis XIV sent d'Iberville to colonize the Mississippi River only 17 years after La Salle include "to secure France's claim over Louisiana.
The other reason is the "fear the British or Spanish would take over Louisiana."
King Louis XIV sent d'Iberville to colonize the Mississippi River in 1699. While he had sent La Salle earlier, from 1681 to 1682, before La Salle was killed in a mutiny when going to Illinois country.
Hence, in this case, it is concluded that the correct answer is to secure France's claim over Louisiana AND fear the British or Spanish would take over Louisiana.
Learn more about French Expedition in the 17th century here: https://brainly.com/question/13284382
