What country was Vasco de gama born and what was an accomplishment .

Vasco De Gama was a Portuguese explorer. His most significant accomplishment was sailing from Portugal to India in 1497.

1 a

2 c

3 c

4 b

5 a

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the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.