1. when should people be considered an adult?

2. when should people have the legal rights of adults for particular activities?

18 or 19

Explanation: that's just when the law tells you that you are an adult

18/19

Explanation:

Because legally most people are considered to be on their own and able to fend and make decisions by this time but sometimes people think 21 is better of an age since you have had some experience of adult hood.

i think its:

c. a disadvantage of the proposal is that there will be fewer people under the monarchy.

1.c

2.a

3.d