The graph tells us that the equation has 2 positive roots. The equation in A has two roots which are 0 and -5. The equation in C has two roots which are -3 and -2. The equation in D has two roots which are -6 and 1. The equation in E has 2 roots which are -?6 and ?6.

Finally the equation in B has 2 roots which are 2 and 3. Thus only this equation has 2 positive roots.