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Going with A

Assume in 2005 for each month sales were $10 hence for 11 months, total = $110

For 2006, sales increases from 10% - 12%,
=> monthly sales were from $11 - $ 11.2
=> 11 months sales range = $121 - $123.2

If A is true then dec. sales < $10 (since it is the slowest) hence total for 2005 sales < $120

which is less than <$121 hence SUFF

Statement 2 is INSUFF cause we don't know if dec 2005 was a blockbuster month.. i.e. sales could be $1000



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