The Experiments of Rainey and Travisano with Pseudomonas Fluorescens Showed

The experiments of Rainey and Travisano with Pseudomonas fluorescens showed that

A) homogeneous environments resulted in adaptive radiation.
B) adaptation occurred without genetic change.
C) the mutation rates were altered by the environment.
D) certain mutations may be beneficial to the bacterium under one condition, but harmful under another.
E) it took a long time for adaptation to occur.