Which of the following means of dissent is against the law? a. participating in a peaceful protest b. threatening the life of a leader c. campaigning for new political leaders d. signing a petition for change

B, because it is the only one that makes sense.

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

500 books can be produced by one man and a printing press within 5 months, while a copyist can only produce one in the same amount of time