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Some students grew plants of the same species
in soils with different pH values. Their data
are shown in the table above. The students
hypothesized that these plants grow best in soil
with a pH of 6.4 to 6.8. According to the
data, which of the following best supports the
hypothesis?
A Plants in Groups 5 and 6 grew the most.
B Plants in Groups 1 and 2 grew the most.
C Plants in Groups 3, 4, and 5 grew the most.
D Plants in Groups 2, 3, and 4 grew the most
