Answer:
One example of poor etiquette in tennis is failing to clearly call out the score before each serve.
Explanation:
Not 100% sure but it might be D.
Layer C formed.
Layer B formed.
Layer A formed.
When layers A-B-C were present, intrusion D formed.
Intrusion D cut through layers A-C.
Fault E formed, shifting rocks A through C and intrusion D.
This is because having natural human tendencies allow for a younger generation to consistently question the old way of though which in turn leads to a different demand and a new insurance in school of thought
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