### 28) When a pair of 1-ohm resistors are connected in series, their combined resistance is
A) 1 ohm, and when connected in parallel, 2 ohms.
B) 2 ohms, and when in parallel, 1 ohm.
C) 1/2 ohm, and when in parallel, 2 ohms.
D) 2 ohms, and when in parallel, 1/2 ohm.
E) none of these.