Answer:
What is the age of Earth.
Step-by-step explanation:
Testing Medince on animals is already widely-banned in countrys so it wouldn't be a scientific question Cause this is personal opinion
The most intresting subject to study is another matter of opnion and not a scientific Question
Should oil drilling be banned does affect the earth but yet is another matter of opion.
Making what is the age of the earth the only liable questons cause the answer will be facts that are supported by evidence rather than matter of opinion