Hi Guys,
Please find my reasoning below:
Meaning Derived :
A great cause of concern among public health specialists is the preponderance of dioxins and polychlorinated biphenols in the food chain, increasing the risk of bio-accumulation of these toxins in fatty tissue and to result in elevated risk of developing sarcomas.
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Health specialists are concerned about the majority or increasing strength of chemicals in the food chain.
This increase in chemical quantity in the food chain, has led to increase in the risk of bio-accumulation and the risk of developing sarcomas.
A.
increasing the risk of bio-accumulation of these toxins in fatty tissue and
to result - Not parallel to each other
B.
with increased risk of bio-accumulation of these toxins in fatty tissue and resulting - the author wants to show cause and effect but "with increased" does not justify this relation well.
C.
and their increased bio-accumulation in fatty tissue, which results - similar reason of cause and effect mismatch, using and makes the sentence more of a fact than .
D.
increasing the risk of bio-accumulation of these toxins in fatty tissues and
resulting - parallel to each other and showing the cause effect relation correctly, hence. Marking it as the best answer.
E.
to increase the risk of their bio-accumulation in fatty tissue and
to result - while this appears to be parallel, it clearly displaces the cause and effect relation.
Hence correct answer : D. <IMO>