Please submit your concern

Explanation:

Option 4 is stated verbatim in the passage - “no doubt, the fact that most beer is bought by individuals...as a raw material by firms, which could be expected to be more rational than individuals...”
Option 1 contradicts what is stated in the passage.
Options 2 and 3 are extreme in their propositions, as they state that firms are always rational and more so than individuals.
Option 5 cannot be inferred from the passage. The passage discusses behavior with respect to the psychophysical goods such as beer and not all goods.
Hence, the correct answer is option 4.