What is the cause of Buddhism spreading across japan

Buddhism was officially transmitted to Japan in 525, when the monarch of the Korean kingdom of Baekje sent a mission to Japan with gifts, including an image of the Buddha, several ritual objects, and sacred texts. Buddhism's journey from India to China, Korea, and Japan had taken about a thousand years.

Explanation:

c. pro-democracy demonstrations.

to replace ineffective because   andrew jackson's spoil system was a deliberate policy after he became president to remove federal employees he considered to be political opponents and replace them with his own supporters.