The correct option is
D 6,572 + 43,923
Say:
1. Two trucks A and B supply toys.
Steps:
1. What do we need to determine?
a. The total number of toys received by the company
2. What is the standard form of the six thousand five hundred seventy-two?
a. 6,572 (WB1)
3. What is the standard form of the forty-three thousand nine hundred twenty-three?
a. 43,923 (WB2)
4. What are the two standard numbers we have now?
a. 6,572 and 43,923
5. What is the total number of toys received by the company?
a. 6,572 + 43,923 = 50,495 (WB3)
6. What can be the correct answers?
a. Both 6,572 + 43,923 and 50,495 (WB3)
Hence, Options C and D are correct.
WB:
(WB1)