Which of the Following Is an Example of Collecting Evidence

Which of the following is an example of collecting evidence through material artifacts?

A) Ally Clark,a research student,decides that she will start her data collection by going through mementos left on gravestones.
B) Hayley Williams,a human resources executive,decides to collect data by interviewing some of the employees.
C) Clint Cameron,a marketing executive,opts for a survey research and decides to collect data through questionnaires.
D) Violet Graham,a marketing executive,organizes a focus group and collects data from the observations during the focus group.
E) Serena Carter,an intern in a software company,collects data that is related to job satisfaction by preparing a questionnaire and mailing it to all the employees in the company.