3. A that has been affected by acid rain may have an altered pH level. Although the pH may be lower than normal, the lake

may still appear blue and clear
Which of the following best explains why this may occur?
A. Acid rain may promote the growth of organisms that consume lake algae.
B. Acid rain may introduce invasive species that compete with algae for resources.
c. Acid rain may neutralize the lake's natural alkalinity which would decrease any cloudiness.
D. Acid rain may affect the whole lake ecosystem by first killing algae that cause cloudiness.

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