Signals are treated as ________ if connected points become defective. A. Defective B. Restricted C. Both D. None of these

The correct answer is: B. Restricted

Signals are treated as restricted if connected points become defective. This means that the signal will not be able to send or receive data until the defective points are repaired.

Option A is incorrect because signals are not treated as defective if connected points become defective. Option C is incorrect because signals are not treated as both defective and restricted if connected points become defective. Option D is incorrect because signals are treated as restricted if connected points become defective.