Which of the Following Best Describes Electrophoretic Gels Used for DNA

Which of the following best describes electrophoretic gels used for DNA?

A) Most separations are done horizontally, while sequencing gels are typically run vertically.
B) Most separations are done vertically, while sequencing gels are typically run horizontally.
C) Most electrophoretic gels are run horizontally, whether for separation or sequencing.
D) Most electrophoretic gels are run vertically, whether for separation or sequencing.