Why can't my sister respect me? Why does she always have to be such an antagonist?

I don't know what it is with her, but she's always so rude to me, never respects the fact that I am older than her and always tries to argue with me, when, under certain circumstances, it isn't her place to argue with me.

She's 16, so it might be just phase of verbal aggressiveness, but it's been going on for far too long.

How can I make her realise that she needs to show me, and my parents in fact, more respect?
Why can't my sister respect me? Why does she always have to be such an antagonist?
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