Why is a gel electrophoresis often followed by a Southern blot?
A. A Southern blot is required to properly align the bands for analysis by technicians. B. The gel is difficult to handle; the Southern blot allows for analysis by technicians. C. The gel electrophoresis technique is messy; the Southern blot allows technicians to see the sample better. D. The gel evaporates quickly during electrophoresis; the Southern blot slows down evaporation.