The correct is (20)
And why it is Let us assume that A, B, and are three numbers where A and B are negative numbers and C is a positive number. The possible values of the product of the three numbers can be option a. 20 where A, B, and C can be equal to -2, -2, and 5. The possible values of the product of the three numbers can be option b. 10 where A, B, and C can be equal to -1,- 2 and 5