Which equations are true? Select all that apply. A. 30 × 100 = 3 , 000 B. 30 × 10 3 = 30 , 000 C. 30 × 1 , 000 = 3 , 000 D. 30 × 10 4 = 3 , 000 , 000 E. 30 × 10 , 000 = 30 , 000