Answer;
A. I need thirty-six colors for this painting
Step-by-step explanation;
A hyphen (-) is a punctuation mark that's used to join words or parts of words.
It's not interchangeable with other types of dashes.
They are used to link words that function as a single adjective before a noun. They are used with compound numbers, and to avoid confusion or awkward letter combinations. Hyphens are also used with certain prefixes and suffixes and in certain special cases.