If x>yx > yx>y and z<0z < 0z<0, which of the following is true?
xz>yzxz > yzxz>yz
xz<yzxz < yzxz<yz
x+z<y+zx+z < y+zx+z<y+z
x/z>y/zx/z > y/zx/z>y/z