The Test for Determining Whether or Not a Gratuitous Agent

The test for determining whether or not a gratuitous agent has breached their duty of care to the principal is:

A) A subjective test which entails consideration of what the agent thought was reasonable action in the circumstances.
B) A subjective test which entails consideration of the degree of care a professional of reasonable skill and competence would exercise.
C) An objective test which entails consideration of the degree of care that the agent ordinarily uses in attending to their own affairs.
D) An objective test which entails consideration of the degree of care a reasonable person would exercise.