A famous singer recently won a lawsuit against an advertising firm for using another singer in a commercial to evoke the famous singer's well-known rendition of a certain song. As a result of the lawsuit, advertising firms will stop using imitators in commercials. Therefore, advertising costs will rise, since famous singers' services cost more than those of their imitators.

The conclusion above is based on which of the following assumptions?

• AMost people are unable to distinguish a famous singer's rendition of a song from a good imitator'srendition of the same song.  
• BCommercials using famous singers are usually more effective than commercials using imitators offamous singers.  
• CThe original versions of some well-known songs are unavailable for use in commercials.  
• DAdvertising firms will continue to use imitators to mimic the physical mannerisms of famous singers.  
• EThe advertising industry will use well-known renditions of songs in commercials.