Tsunamis pose the greatest threat to populations living OA. in the Rocky Mountains.
OB. in the desert.
OC. far inland.
OD. along the coast.

Along the Coast

Explanation:

A tsunami is a giant wave, meaning it would not impact those far inland, on mountains, or in a desert climate.

For three centuries, the black community has been treated badly. This racism has killed the chances of black to succeed in competitive America. Till today, this discrimination has caused a lot of damages to the black, and hence, may be harmful. To set the record straight, the civil era has caused the black a whole lot of injuries, as they weren't given employment because of hatred, police brutality, racism etc. As a result of this, some black were able to withstand the pressure in the work force, same as they failed to withstand it as a group due to inequality of material, and general problems.