A Convex Lens Has Focal Length $f$ If an Object Is Placed at a Distance Of Object

A convex lens has focal length $f$ . If an object is placed at a distance of $2 f$ from the lens on the principal axis, the image is located at a distance from the lens

A) of $2 f$ .
B) between the lens and $f$ .
C) between $f$ and $2 f$ .
D) of infinity.
E) of $f$ .