A Magician Can Make a Candle Look as If It

Multiple Choice

A magician can make a candle look as if it is burning under water by focusing light from a candle flame burning in air directly on top of an underwater candle.To do this you want to use a (Hint: eliminate those that cannot work. )

A) concave mirror farther than one focal length from the burning candle.
B) a convex mirror farther than one focal length from the burning candle.
C) a biconcave lens farther than one focal length from the burning candle.
D) a concave mirror closer than one focal length to the burning candle.
E) a convex lens closer than one focal length to the burning candle.