Answer:
A and D
Explanation:
A. 7 x 391 = 7 x (300 + 90 + 1)
2737 = 7 x (391)
2737 = 2737 TRUE
B. 7 x 391 = 7 + (300 + 90 + 1)
2737 = 7 + (391)
2737 = 398 FALSE
C. 7 x 391 = (7 x 300) + 90 + 1
2737 = 2100 + 90 + 1
2737 = 2191 FALSE (plus isn't using the distributive property)
D. 7 x 391 = (7 x 300) + (7 x 90) + (7 x 1)
2737 = 2100 + 630 + 7
2737 = 2737 TRUE
E. 7 x 391 = 2,100 + 630 + 7 (isn't following the distributive property)