There are different types of biases in a survey sampling. This includes: under coverage, nonresponse bias, response bias, voluntary response bias, etc.
A.- 2.
B. - 3.
C. - 1.
A. Under-coverage - 2. Few chosen representatives are not good sample for that project. Thus, not a representative sample.
B. Response bias - When there is expectation of a selected answer. Thus, expecting a certain answer.
C. Question-wording bias - 1. The wordings in an answer is false or inappropriately put together. Thus, Answer given do not reflect true views
I believe it is the connective tissues
