Question:Which of the following statements are true about C++ vector class? 

A vector::empty deletes all elements of the vector 

B vector::erase can be used to delete a single element and a range of elements of the vector 

C After calling, vector::erase causes some of the iterators referencing the vector to become invalid 

D vector::count returns the number of elements in the vector 

E vector::size returns the number of elements in the vector 

F vector::capacity returns the number of elements in the vector 

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