Why were the precedent set by cheif justice john marshall and the supreme court so important?

They influenced U.S. legal and economic systems.

Explanation:

John Marshall, (1755—1835), was the fourth chief justice of the United States and is regarded as the main founder of constitutional law in the United States, as well as the Supreme Court’s most influential chief justice. He was in charge of building and advocating for the establishment of constitutional law and federalism.

In Marbury v. Madison (1803), Marshall installed the Supreme Court’s right to declare unconstitutional legislation. In McCulloch v. Maryland (1819) he defended federalism by asserting that the right a state had to tax an instrument of the federal government was unconstitutional.

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

a. would be the answer : )

explanation: