HEYA!!!!
The answer am not sure about... it could be B.
Some geological time periods are not represented in the strata forming the Grand Canyon, because the evolutionists believed that there are large "time-breaks". However, others believe that there is "erosion [that] was very rapid, facilitated in many cases by erosion occurring in soft, ‘non-hardened’ rock". This generally leads to evidence of "The Flood".
HOPE it helps you.....
:)
