Answer:
research study showing that 16 year olds can understand complex issues
Step-by-step explanation:
this is the best evidence because if it's a study then that mean there's proof to it and it's unbiased. the first option is biased because they work for the campaign, the second has no relation to why they should vote at 16 because it's only how they view adults, and the last one also has no relation to it because it's just about different cultures and 16 year olds in those parts.