Suppose you wanted to start a fire using sunlight and a mirror. which of the following statements is most accurate? a) it would be best to use a plane mirror. b) it would be best to use a concave mirror, with the object to be ignited positioned halfway between the mirror and its center of curvature. c) it would be best to use a concave mirror, with the object to be ignited positioned at the center of curvature of the mirror. d) it would be best to use a convex mirror. e) one cannot start a fire using a mirror, since mirrors form only virtual images.