The correct answer is D. The variable name “dblMy Age” contains the reserved word “dbl”. Reserved words are words that have a special meaning in a programming language. They cannot be used as variable names.
Option A is incorrect because the variable name does not start with an uppercase character.
Option B is incorrect because the variable name contains both uppercase and lowercase characters. This is allowed in most programming languages.
Option C is incorrect because the variable name does not contain a space. Spaces are allowed in variable names in most programming languages.