Solution:
we are given that 3790241068.
we have been asked to Insert commas in the correct positions for the number.
The given number 3790241068 represents 3 billion 790 million 241 thousands and 68.
So the commas can be given accordingly so the number with commas will be
3,790,241,068
Hence the correct option is
D. 3,790,241,068