<span>Florida's legal definition of controlled substances includes opium and its derivatives (opioids), as well as cocaine and all of its derivatives. These substances are referred to as "controlled" because they require a prescription from a doctor in order to obtain legally.</span>
Answer: (7) It appears that tremendous numbers of consumers are influenced by advertising, despite their claims to the contrary.
Explanation:
The main idea of this passage is that advertising works despite people's claims to the contrary.
This is the main idea because every other sentence centres around this one with the first sentence attempting to explain how it works.
The second sentence then attempts to disprove it while the third, fourth, fifth and the sixth show show evidence of its truthfulness.
