It is C and the French didn't help matters by not declaring what the boundries of the land actually were. Spain controlled Louisiana (New Orleans and the Mississippi going up for 100 miles). There was no other way that was better than the Mississippi to transport goods from Ohio Valley (for example).
C <<<<< ===== Answer.
Answer:
The Vietnam war
Explanation:
His popularity plummeted due to the Vietnam war so this would be one of Lyndon B. Johnson’s downfalls
