An Object Is Placed on the Left Side of a Thin

An object is placed on the left side of a thin lens,and the image of this object is formed on the left side of the lens.Which of the following statements must be true? (There could be more than one correct choice.)

A) The lens must be a concave lens, and the image is upright.
B) The lens must be a convex lens, and the image is upright.
C) The image is upright and virtual.
D) The lens could be either a convex or a concave lens, and the image is upright.
E) The image is inverted and real.