What was a cultural change that occurred as a result of the Columbian Exchange? A. Europeans found new opportunities in America. B. Native Americans traveled to Europe for jobs. C. Native Americans became less dependent on livestock. D. Europeans became more isolated.

im almost positive the answer is a.

Explanation:

b and c are not true and the europeans began colonizing and growing bigger in the new world.

explanation:

there are two statements that are incorrect.

1. the marshall plan was a lend lease program. it was an economic plan that europe redevelop itself after wwii.

2. einstein didn't really do anything to further the allied cause in building the bomb. he merely sent a letter to fdr telling him (in 1939) that if the united states entered the war, perhaps it would be wise to build the bomb before germany did. i would say this answer is incorrect, but when america entered the war 2 years later, fdr thought it might be a good idea to take einstein's advice.

the 4th choice is definitely so wrong that is likely the single answer of this question

health and medicine because people are dying from not being healthy or not strong enough medicine