$3.(20$ pts$)$ Choose the most appropriate answer in each of the following cases $($with a brief justification$).$B: In token$-$passing over a logical ring that is realized over a bus topology $($with token$-$holding time: $1$ packet$-$time per station$),$ the most influential factor in determining the channel access delay is:

$($i$)$ Number of stations on the ring;

$($ii$)$ Transmission capacity of the bus; $($iii$)$ Traffic load offered by the stations; $($iv$)$ Physical length of the bus.