Answer: Diego is using Active strategy to reduce uncertainty.
Explanation: Active strategy is an act of using a well known tested and trusted method to generate the best result possible.
Diego asking Louisa's sister is an active strategy as Diego doesn't want to leave anything to chance.
C) Textiles industry was the first mechanized industry.
The answer is B) but if not then it's C)
The dark ages in Greece lasted 300 years
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