When Ron Evans Generated Transgenic Mice in Which the Gene

When Ron Evans generated transgenic mice in which the gene PPAR-delta was constituitively active (i.e., always expressed) , he found that these mice showed a shift from fast glycolytic fibers to slow oxidative fibers. One consequence of this change was that the transgenic mice

A) showed greater endurance in a running test.
B) showed less endurance in a running test.
C) had leg muscles with lower mitochondrial and capillary densities than wild-type (nontransgenic) mice.
D) were more likely to become obese than wild-type (nontransgenic) mice.
E) had muscles that were not as red as those of wild-type (nontransgenic) mice.