Which two signs and two numbers should be interchanged in the following equation to make it correct?
$$98 − 9 \times 21 \div 7 + 56 = 69$$

A

56 and 9, + and $$\times$$

B

56 and 21, + and $$\times$$

C

98 and 9, + and $$\times$$

D

21 and 7, + and $$-$$