Which two mathematical signs should be interchanged to make the given equation correct?

$$(75 + 15) \times 27 \times 1 - 9 \div 7 \times (135 + 3) - 10 \div (189 + 63) = 434$$

A

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

B

$$ +$$ and $$-$$

C

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

D

$$ \div$$ and $$-$$