_____________is/are a method of measuring that provides information which is/are not filtered by others and which permit(s)intensive coverage, although it is quite time consuming.
A)Statistical reports
B)Oral reports
C)Written reports
D)Personal observation

Question

Quizplus · Accepted Answer

Personal observation allows for direct and unfiltered information gathering, offering intensive coverage of the subject matter. However, it is time-consuming because it requires the observer's physical presence and attention to detail over potentially extended periods.

_____________Is/are a Method of Measuring That Provides Information Which Is/are