The U.S. dollar has lost the strength of its buying power from 84.04 in March 2009 to 69.85 in May ...

The U.S. dollar has lost the strength of its buying power from 84.04 in March 2009 to 69.85 in May 2011 . This means
 
  a. Sourcers now need 17 less dollars to purchase the same clothing and textile products that they did in 2009.
  b. Sourcers now need 17 more dollars to purchase the same clothing and textile products that they did in 2009.
  c. Sourcers now need 20 less dollars to purchase the same clothing and textile products that they did in 2009.
  d. Sourcers now need 20 less dollars to purchase the same clothing and textile products that they did in 2009.