问题

According to the data in Figure 3, what effect, if any,did removing the herbaceous layer h

According to the data in Figure 3, what effect, if any,did removing the herbaceous layer have on the percent distribution among the 1-year-old seedlings in the 1-hectare area of the forest？ The removal of the herbaceous layer:

A.changed the percent for the northern red oak only.

B.changed the percent for the red maple and the percent for the white pine only.

C.changed the percent for each of the 5 tree species.

D.did not change the percent for any of the 5 tree species.

请帮忙给出正确答案和分析，谢谢！

参考答案

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