A criticism of the revision to the Renewable Fuels Standards in 2014 was that it favored Midwestern-grown corn as a biomass source over more efficient alternatives available in foreign countries, such as sugar cane in Brazil.

Retained customers ________ than switchers

A) are more expensive to serve B) are more profitable C) have lower lifetime customer value D) are more price sensitive

On an online ________, prices change by the minute

A) buying alliance B) barter market C) systems seller D) spot market E) catalog site