(A)

(B)

(C)

(D)

(E)
$2 - 1$

Multiple Choice

(a)

(b)

(c)

(d)

(e)


Figure $2 - 1$

-Which switch in Figure 2-1 is usually used to control a doorbell?

A) graph (a)
B) graph (b)
C) graph (c)
D) graph (d)
E) graph (e)