Up to about 10,000 years ago, white spruce was a tree that grew across Canada and much of the northeastern and central United
States. About 16,000 years ago, the North American
climate began to warm. Now, white spruce are only found in Canada and parts of
the northeastern United States.
Which statement explains the most likely cause of the change in white spruce distribution?
O An invasive species outcompeted white spruce in parts of the United States.
O White spruce couldn't tolerate warmer climates and were pushed northward.
O White spruce suffered from a disease outbreak that killed trees across the United States.
O White spruce seedlings require warm temperatures to germinate but grow very slowly.