Answer:
A. It is not possible to know how Earth processes have changed over time; therefore, it is not possible to deduce how Earth's ancient landforms evolved.
B. The Earth's geological history is mostly uniform and homogenous, existing now as it mostly always has with the exception of minor recent changes.
C. The processes by which streams carve valleys at present are the same as those that carved valleys 500 million years ago.
D. Catastrophic events, such as major landslides, earthquakes, and volcanic episodes, are the primary drivers of geomorphological change.
E. Prior to written history, knowledge of Earth history is largely unknowable.
Step-by-step explanation: