87. While they remove carbon dioxide from the air, conserve soil and water, and house thousands of species, forests also supply potentially valuable
pharmaceuticals, and, as sources of building material and firewood, that provide employment for millions worldwide.
A. pharmaceuticals, and, as sources of building material and firewood, that provide
B. pharmaceuticals, and sources of building material and firewood, are providers of
C. pharmaceuticals and, as sources of building material and firewood that are provide
D. pharmaceuticals and as sources of building material and firewood, for providing
E. pharmaceuticals and, as sources of building material and firewood, provide
I think this particular problem is more related with the meaning of the sentence.
Forests supplies pharmaceuticals.
and 'as sources of building material and firewood' forests provide employment for millions worldwide.
The above combination conveys the meaning clearly.
A. pharmaceuticals,
and, as sources of building material and firewood, that provide
'and' creates a fragment sentence
B. pharmaceuticals, and
sources of building material and firewood, are providers of
meaning distortion
C. pharmaceuticals and, as sources of building material and
firewood that are provide
meaning distortion
D. pharmaceuticals and
as sources of building material and firewood,
for providing parallelism, 'for providing' meaning distortion
E. pharmaceuticals and, as sources of building material and firewood, provide
correct
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Luck is the additional surplus on the way to one's constant effort.