An Object Is Placed at F in Front of a Concave

Multiple Choice

An object is placed at F in front of a concave mirror with a focal length of 10 cm. What is the position of its image in relation to the mirror and what are its characteristics?

A) = 10 cm, real, smaller than object
B) = 10 cm, virtual, smaller than object
C) = 20 cm, real, bigger than object
D) = 20 cm, virtual, bigger than object
E) = ∞, real, much bigger than the object