Answer: Random sampling
Explanation:
- A random sampling technique is the basic sampling technique in which the researcher randomly choose individuals from the whole population . This sampling method provides equal opportunity to each and every individual in the population to get selected for the sample.
In the given situation , the population of interest is "all adults"
Since the man got selected randomly from entire population of adults by the marketing company, it means the type of sampling method was used is random sampling technique.
Hence, the correct answer is "random"