The correct answer is B) Many immigrants came to the Middle colonies seeking religious freedom.
The other options of the question were A) Cash-crop agriculture became more profitable in the Southern colonies. C) Several northern colonies decided to outlaw slavery. D) The first English colonists formed a successful colony.
The statement that best describes an effect of William Penn's actions on colonial America is "Many immigrants came to the Middle colonies seeking religious freedom."
William Penn was the founder of the Pennsylvania colony in March 1681. The idea of William Penn was to settle in and have a new colony that supported religious tolerance for every individual could practice its religious belief with freedom. Many Quakers decided to travel to the new American territory to start a new life.
