which caused the us army to take over the atomic research project being conducted at columbia university in…

which caused the us army to take over the atomic research project being conducted at columbia university in the early 1940s?\nthe first atomic bomb test\na letter from albert einstein\njapans research into atomic bombs\nthe us entry into world war ii

which caused the us army to take over the atomic research project being conducted at columbia university in the early 1940s?\nthe first atomic bomb test\na letter from albert einstein\njapans research into atomic bombs\nthe us entry into world war ii

Answer

Brief Explanations:

In the early 1940s, a letter from Albert Einstein to President Franklin D. Roosevelt in 1939 alerted the US government to the potential of atomic - powered weapons and the need for research. This led to the US Army taking over atomic research projects like the one at Columbia University as part of the Manhattan Project.

Answer:

B. a letter from Albert Einstein