The number 14 is classified as an integer, natural number, and whole number. Therefore, the correct answer is 'all of the above.' Each classification includes 14 as it is a positive whole number without any fractional part. ;
The number 14 is classified as an integer, natural number, and whole number, making the correct answer 'D. All of the above.' Each category includes 14 since it is a positive, non-fractional whole number.
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