3) What are some ways Joseph Stalin strengthens his control of the Soviet Union ?

Stalin outmaneuvered his rivals for control of the party. Once in power, he collectivized farming and had potential enemies executed or sent to forced labor camps.

Explanation:

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c or d both can be the answer

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on