What type of exposure would have been experienced by a person who received a lifetime of background radiation from a low-level radioactive dump site? 

A)  a subacute exposure to radioactive substances 
B)  a chronic exposure to radioactive substances 
C)  a subchronic exposure to radioactive substances 
D)  an acute exposure to radioactive substances

Chronic Exposure

Prolonged exposure to a substance or environmental condition, typically at low levels, over a long period of time, potentially leading to adverse health effects.

Background Radiation

The natural ionizing radiation present in the environment, originating from cosmic rays and natural radioactive materials.

Radioactive Dump Site

An area designated for the disposal of radioactive waste materials, which poses significant long-term environmental and health risks.