Which country sent a large fleet across the indian ocean at the beginning of the fifteenth century?

What would lead a historian to consider two events to have a relationship of correlation rather than causation

What is intervention ? in government terms

What was the significance of the british reform act of 1832? a. voters were given the right to vote by secret ballot b. members of the middle class were permitted to run for parliament c. members of the working class demanded and received better living conditions d. farm workers, factory workers, and women were given the right to vote