Notwithstanding much educated ______, even as we speak, there is no ______ relationship between current levels of hydrocarbon output and ozone deterioration.

Notwithstanding much educated ______, even as we speak, there is no ______ relationship between current levels of hydrocarbon output and ozone deterioration.
A. speculation. . .tenuous
B. conjecture. . .proven
C. evidence. . .speculative
D. argument. . .rational
E. confusion. . .systematic

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