Answer:
a) symbolic interactionism
Explanation:
Symbolic interactionism aims to understand the subjective meaning that people associate with behavior, objects and events. This theory has its roots in the belief that people act according to what they believe in and not what is objectively true.
Here, the researcher thinks that the thieves do this because they think that they are doing this as a sport. He also believes that the thieves are showing their worth by stealing bikes from people who are not smart. The thieves think that they deserve the bicycles more. The thoughts of the theives are not objectively true.
Hence, their actions is an example of symbolic interactionism.