Simplify a given switching circuit to an equivalent circuit

1. A.
   Circuit (a)
2. B.
   Circuit (b)
3. C.
   Circuit (c)
4. D.
   Circuit (d)

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1. A.
   Circuit (a)
2. B.
   Circuit (b)
3. C.
   Circuit (c)
4. D.
   Circuit (d)

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1. A.
   $S_1'$ and $S_2'$ in parallel
2. B.
   $S_1$ and $S_2$ in parallel
3. C.
   $S_1'$ and $S_2'$ in series
4. D.
   $S_1$ and $S_2$ in series

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1. A.
   (A)
2. B.
   (B)
3. C.
   (C)
4. D.
   (D)

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1. A.
   Circuit A
2. B.
   Circuit B
3. C.
   Circuit C
4. D.
   Circuit D

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1. A.
   $0$
2. B.
   $1$
3. C.
   $2$
4. D.
   $3$

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1. A.
   Circuit A
2. B.
   Circuit B
3. C.
   Circuit C
4. D.
   Circuit D

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