Which of the mathematical signs should be interchanged in the below equation to make it mathematically correct?
$$3 + 78 \div 13 - 9 \times 117 = 126$$

A

$$+$$ and $$-$$

B

$$+$$ and $$\times$$

C

$$+$$ and $$\div$$

D

$$\div$$ and $$\times$$