The correct answer is B) B and D. The double throw switch is represented by the switch labeled "B" and the switch labeled "D" in the illustration EL-0176. A double throw switch is a type of electrical switch that can connect a circuit to one of two different circuits, effectively allowing the circuit to be "thrown" or switched between the two different options. The other answer choices are incorrect because they do not correctly identify the double throw switch in the illustration. Option A (A and B) is incorrect because only the switch labeled "B" is a double throw switch. Option C (C and D) is incorrect because the switch labeled "C" is not a double throw switch. Option D (A and D) is incorrect because the switch labeled "A" is not a double throw switch.