The largest astronomical refractor has an aperture of 1 meter. Select all true statements below about why it would be impractical to build an even larger refractor with, say, twice the aperture. Choose one or more: A. A lens with a 2 m diameter would be very heavy and would deform under its own weight within a few years. B. The tube would have to be so long that housing and moving it would be extremely difficult, especially because it would be frontloaded with weight. C. The distance between the two objective lenses would have to increase. D. The degree of chromatic aberration increases as the focal length gets longer, and this would reduce image quality