A developer has an integer variable called maxAttempts. The developer needs to ensure that once maxAttempts is initialized, it preserves its value for the length of the Apex transaction; while being able to share the variable's state between trigger executions. How should the developer declare maxAttempts to meet these requirements?

A. Declare maxAttempts as a private static variable on a helper class.
B. Declare maxAttempts as a variable on a helper class.
C. Declare maxAttempts as a member variable on the trigger definition.
D. Declare maxAttempts as a constant using the static and final keywords.

Suggest answer: D

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