Answer:
1. Older people are not in any way better than younger people.
2. b) the writer is fed up of being judged by old people
3.
Facts:
'...I'm sixteen. Old enough, in some countries, to get married'
'...A decision that will affect the next four years'
Opinions:
'Young people are no more or less responsible, hard-working and politically aware than old people'
'A momentous decision that will affect my whole life'