Which of the Following Does NOT Represent a Major Drawback

Multiple Choice

Which of the following does NOT represent a major drawback when developing a refracting telescope for astronomy?

A) Lenses cannot be made with focal lengths that produce very high magnifications.
B) Glass lenses are not completely transparent to certain kinds of light,restricting the observable wavelength range.
C) The lens brings different wavelengths of light to a focus at different positions.
D) The presence of defects in the glass lens through which the light must pass causes some of the light to scatter out of the beam.