Heads Up: I don't remember reading this article, but I'll do the best I can to help
Answer:
I'd say the answer is
Part 1. (D) Young people join the current environmentalist efforts
Part 2. (B) "Students across the planet who were concerned about climate change began making their voiced heard"
Give the multiple choice answers
Answer: It can be proven using objective evidence.
Explanation:
Factual information can be proven by objective evidence based on research into the information. Information that is not factual can also be proven to be baseless by the same method.
If indeed therefore, that the above scenario can be proven by objective evidence then it would be considered factual. Should there be an investigation and the evidence is not objective, this would not have been factual.