Answer:
OPTION C: The ratio is a constant.
OPTION E: The ratio is equal to b.
Step-by-step explanation:
Given: 
The ratio of f(x + 1) and f(x) = 
Since, 

Cancelling out
we get:

This shows that the ratio is always a constant and that constant is equal to b.
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Answer:
D.
Step-by-step explanation: