When a transistor is in saturation, the total collector current is limited by （ ）.

A、collectorsupplyvoltageandthetotalresistanceinthecollectorandemittercircuits
B、collector-to-emitterandcollectorsupplyvoltage
C、collectorsupply,collector-to-emittervoltage,andthetotalcollectorcircuitresistance
D、thetransistor