I just need help with question g

For the following report about a statistical study, identify (if possible) a) the population; b) the population parameter of interest; c) the sampling frame; d) the sample; e) the sampling method, including whether or not randomization was employed; f) what (if anything) was left out of the study; and g) any potential sources of bias you can detect and any problems you see in generalizing to the population of interest. An environmental agency took soil samples at 16 locations near a former industrial waste dump and checked each for evidence of toxic chemicals. They found no elevated levels of any harmful substances. O D. The soil at other former waste dumps. g) What type of bias is evident in this sample? O A. None O B. Undercoverage and nonresponse bias O C. Undercoverage and response bias O D. Voluntary response bias O E. Response bias