A Real Object Is 42 Cm from a Lens with a Negative

A real object is 42 cm from a lens with a negative focal length f = -21 cm. The image is

A) real and 14 cm from the lens.
B) real and 42 cm from the lens.
C) virtual and 42 cm from the lens.
D) virtual and 21 cm from the lens.
E) virtual and 14 cm from the lens.