Which two numbers(not digits) and two signs should be interchanged to make the given equation correct?
$$18 \div 3 - 30 + 15 \times 2 = -1$$

18÷3−30+15×2=−1

Option A) 18 and 15; $$+$$ and $$-$$

15÷3+30-18×2=−1

So, this is a correct option.

Option B) 2 and 18; $$+$$ and $$\times$$

2÷3−30×15+18=-431$$\frac{1}{3}$$

So, this is not the correct option.

Option C) 15 and 3; $$+$$ and $$-$$

18÷15+30-3×2=25$$\frac{1}{5}$$

So, this is not the correct option.

Option D) 3 and 30; $$\times$$ and $$+$$

18÷30−3×15+2=-42 $$\frac{2}{5}$$

So, this is not the correct option.