✔ 最佳答案
C is the correct answer.
Why? Please see the following explanation.
A (it is laterally inverted) is not correct because although the virtual image
formed from the plane mirror is laterally inverted, the virtual image formed
by a concave lens is not.
B (it is of the same size as the object) is also not correct because although the virtual image formed from the plane mirror is the same size as the object , the virtual image formed by a concave lens may not.
D (it is as far behind the mirror as the object is in front) is not correct because the image distance is equal to the object distance in mirror reflection.
As a result, the answer is C.