The correct answer choice is answer choice B, The monster reared its head at the tourists. Many people do not understand the difference between its and it's.
Its - possessive form of it
It's - contraction meaning 'it is'
When trying to figure out whether to use 'its' or 'it's', ask yourself if the sentence makes sense when you substitute 'it is'. If it does, then use 'it's'. If it doesn't, use 'its'.
