What factor most likely caused the large jump in defense spending from 1950 to 1952?

A-Competition with the Soviets over hydrogen weapons

B-Rising costs of the Marshall Plan

C-U. S. involvement in the Korean War

D-Building the interstate highway system

Please help me in this question I heed your help !!

option a

explanation:

to cleberate the end of their war

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.