Answer: A. definition by example
Explanation:
A definition by example is when a characteristic or the variable being defined is defined by using another variable as an example.
For instance, To understand the feeling of drinking a cold Coca-Cola in the middle of Florida summer, just take a cold bath.
Here the refreshing qualities of coke are described as taking a cold bath.
In the question, the definition of corruption is the Democratic Senator which makes it a definition by example.
