How did the contribution of the services sector to GDP change between 2009 and 2011? It rose by less than 1 percent. It fell significantly. It rose significantly. It stayed exactly the same.

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Afarmer began a new method of reducing grain spills. this reduced the number of mice on the farm. the number of snakes in the surrounding area decreased at the same time. the snakes depended on the mice that lived in the field. what’s the likely reason the snake population decreased? a. the number of snake predators increased. b. the number of mice increased. c. the number of mice decreased. d. the pesticides affected the snakes. e. a new breed of mice moved into the field.