What were the 3 main areas of focus under Stalin's 5-year plan?

AnswerStalin's First Five-Year Plan, adopted by the party in 1928, called for rapid industrialization of the economy, with an emphasis on heavy industry. It set goals that were unrealistic—a 250 percent increase in overall industrial development and a 330 percent expansion in heavy industry alone.

Explanation:

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the answer is a. 250 percent.

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.