How is an image produced by a plane mirror different than an image produced by a convex mirror?
a it is smaller than the object.
b it is the same size as the object.
c it is inverted
d it is upright.

D. It is upright.

Because convex mirror produce the real image, and the plane mirror produce it's upright.

it is the same size as the object ( B )

Explanation:

An image formed/produced by a plane mirror is different than an image produced by a a convex mirror because image produced by a plane mirror appears the same size as the object while the image produced by a convex mirror does not appear is smaller than the object.

images produced by a convex mirror is usually smaller than the original object, they are upright and they are virtual. they also seem to appear behind the convex mirror. while plane mirror produce images of same size as the object.