Brainlest for the answer! What was an effect of the Mongol invasions during the Kamakura shogunate?

a The invasions were costly to defend against, and they created financial problems.
b The invasions strengthened the economy because people spent money to prepare for war.
c The Mongols won and oversaw a new period of peace that lasted nearly three hundred years.
d The Mongols overthrew the shogunate and brought an end to the feudal system.

the affect on the Various educators teach rules governing the length of paragraphs. They may say that a paragraph should be 100 to 200 words long, or be no more than five or six sentences. But a good paragraph should not be measured in characters, words, or sentences. The true measure of your paragraphs should be ideas.

Explanation:g

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explanation: