explain (in a cause and effect summary) how the crash of 1929 brought the roaring 20's to a end and introduced the Great Depression

Why was president truman against declaring war on china during the korean war? a. he was buying time si that the us could develop more attomic weapons b. he feared that the soviet union might offer china military support c. he was planning the withdrawal of us troops from south korea d. he was afraid that china would support north korea