Bridges have fallen and roads are flooded, making ... nearly impossible for people to...

Question

Bridges have fallen and roads are flooded, making ... nearly impossible for people to communicate with ... and with the outside world. A) them/anybody B) us/one after another C) each other/one another D) it/one another

Answer 1

D) it/one another 
Bridges have fallen and roads are flooded, making it nearly impossible for people to communicate with one another and with the outside world.

Comments

а почему так? можете объяснить?)