Which statement best explains why passenger-side mirrors on automobiles are designed to be convex rather than concave or plane?
a) A convex mirror has a negative focal length, producing real, inverted, and reduced images that minimize blind spots.
b) A convex mirror has a negative focal length, producing virtual, upright, and enlarged images that allow drivers to see objects more clearly.
c) A convex mirror has a negative focal length, producing virtual, upright, and reduced images that give the driver a wider field of view for safety.
d) A concave mirror has a positive focal length, producing virtual, upright, and enlarged images, so distant objects appear closer for quick reaction.