Which two signs and two numbers should be interchanged in the following equation to make it correct?
$$19 + 27 - 4 \div 2 \times 3 = 20$$

A

— and $$\div$$; 4 and 3

B

$$\div$$ and $$\times$$; 19 and 27

C

— and +; 27 and 2

D

+ and $$\times$$; 3 and 2