If deku had to choose he should choose baku.
Answer:
The answer is most likely A
Explanation:
You want the students to find the answer themselves, while encouraging cooperation.
Newspapers and television can be the most biased, because are influenced by owners and journalists personal view. Things can only be published/said with someone's approval, so can be directed to one's point of view.
Internet is the least biased, because its content come from multiple sources. But depending on the source, also can be wrong, or not be reliable.
I think it is a metaphorical statement.