Determine if f left parenthesis x right parenthesis is continuous at x equals 3. If not, select the option with the correct reasoning as to why not. A.) Not continuous at x equals 3 because limit as x rightwards arrow 3 of f left parenthesis x right parenthesis does not exist B.) Not continuous at x equals 3 because f left parenthesis 3 right parenthesis is undefined C.) Not continuous at x equals 3 because limit as x rightwards arrow 3 of f left parenthesis x right parenthesis not equal to f left parenthesis 3 right parenthesis D.) Continuous at x equals 3