Which answer illustrates the correct sequence of events after a landline subscriber lifts a handset?

A$.$ Switch opens and allows circuit between ring and tip to remain open; telco senses off$-$hook condition and provides dial tone; subscriber dials number; telco receives number

B$.$ Telco senses off$-$hook condition and provides dial tone; circuit between ring and tip closes, telco receives number, computer sends ringer signal to destination number

C$.$ Circuit between ring and tip closes; telco senses off$-$hook condition and provides dial tone; subscriber dials number; telco receives number; computer sends ringer signal to destination number

D$.$ Circuit between ring and tip closes; subscriber dials number, telco receives number, computer sends ringer signal to destination number