Answer:
The answer is D. It made it less time consuming and saved workers energy.
Answer:
Nitrogen fixation by bacteria
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Firstly the United States of America told the president of USSR that they were getting wrongly involved with Afghanistan and they should immediately withdraw. On falling in deaf ears, the United States did not participate in 1980 Summer Olympics that was held in Moscow. After this the United states started supplying arms to the various Afghan resistance groups.
