Answer:
believe in the hypodermic needle theory.
Step-by-step explanation:
The hypodermic needle theory may be defined as the method of communication which suggest that intended messages and communication are directly received by the people and they are fully accepted.
It means that media messages are directly given to the passive audiences and inserted into their brains.
In the context, Theodor and Max Horkheimer believes that by advertising, the customers are compelled to buy the products. They believed in the hypodermic needle theory.