Marjorie is conducting a science experiment to measure the amount of pollution produced by cars that used gasoline containing different amounts of lead. Identify the dependent and independent variables.(1 point) Responses i= conducting a science experiment d= the amount of pollution i equals conducting a science experiment d equals the amount of pollution i= gasoline containing different amounts of lead d= the amount of pollution i equals gasoline containing different amounts of lead d equals the amount of pollution i= the amount of pollution d= gasoline containing different amounts of lead i equals the amount of pollution d equals gasoline containing different amounts of lead i= gasoline containing different amounts of lead d= type of car