Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
50 * 2 * 3 * 30 * 10 * 40 * 20

A

$$ =, \times, \times, +, -, \div$$

B

$$-, \div, \times, \times, =, \times$$

C

$$=, \times, +, \times, -, \div$$

D

$$\times, =, \times, \times, −, \times$$