Answer:
C. the data collected from anonymous surveys conducted in malls in Alheroni.
Step-by-step explanation:
A survey is a research system through which Organisations and persons try to know more or determine the perception of people about certain things. Survey are very essential for a business to understand what the society says concerning its products or how it will perform in a new market. Anonymous surveys are surveys conducted by persons whose identity are not declared or can not be immediately determined.