What does Newton's cooling law state about the rate of heat transfer between an object and its environment?

A、Therateofheattransferisdirectlyproportionaltothetemperaturedifferencebetweentheobjectanditsenvironment.
B、Therateofheattransferisinverselyproportionaltothetemperaturedifferencebetweentheobjectanditsenvironment.
C、Therateofheattransferisconstantregardlessofthetemperaturedifference.
D、Therateofheattransferdependsonlyonthepropertiesoftheobject,nottheenvironment.