What Conditions Are Necessary and Sufficient to Demonstrate That the Use

Multiple Choice

What conditions are necessary and sufficient to demonstrate that the use of personal use property is qualified business use? I.Use is for the convenience of the employer.
II) Use is for a business or trade.
III) Use is required as a condition of employment.

A) I.only
B) II only
C) III.only
D) I.and II.only
E) I., II.and III.