<span>B. Population trends</span>
The question isn't complete and you might want to ask this in the math section.
But just to help you out, 3x means 3 times whatever "x" is.
Answer:
I think the answer is.............
1) Lázaro Cárdenas (1934-40).
2) In the wake of the First World War, the non-interventionist tendencies of U.S. foreign policy were in full force.
Explanation:
I hope this help and if isn't right I am sorry.
It had to do with religious freedom