Answer:
The living in company towns made union membership more difficult for workers because (B) Company guards and agents spied on and reported workers.
Step-by-step explanation:
People who worked for company and lived in company towns itself faced many disadvantages and problems. They were often spied and watched continuously by their officials or other people. They could not enjoy their personal life as well. Even if they step out of their houses and move into the streets they are viewed by someone. They cannot enjoy or lead a comfortable life as such. Even if they want to spend their time with their family they could not do even that also. It is a place where they are indirectly treated as prisoners.