The correct answer is: E. None of the above.

A function name does not end with any of the following: double quotes, single quotes, parenthesis, or hash.

A function name is a sequence of letters, numbers, and underscores that begins with a letter. It cannot contain spaces or special characters.

For example, the following are valid function names:

• add
• subtract
• multiply
• divide

The following are not valid function names:

• “add”
• ‘subtract’
• (multiply)

• divide

I hope this helps! Let me know if you have any other questions.