Use the second example. the excitement I had grew exponentially after that,as I wanted to know what would happen to me and my friends next
Your answer would be:
US citizens are required to (options not shown). (Voting) is a privilege that only US citizens can exercise, but it is not required.
hope this helps :)
They understand how much they don't know. ...
They have insatiable curiosity. ...
Higher pay in future career, more expansive choice of future career, a bridge between adolescence and adulthood