*Please help asap taking a test!* (Thank you!) :D Max saw the following problem: 3 · (3 + 12 ÷ 3) - 4 The first thing he did was add 3 + 12 to get 15. What is Max's error?

-He should have multiplied 3 · 3 first
-He should have subtracted the 4 first
-He should have divided 12 ÷ 3 first
-He did the correct thing first