Answer:D. Neither the apartment building nor the computer consulting business is a passive activity.
Explanation: A Passive Activity is an activity where the tax payer does not take a substantial or material part in. It was described by the INTERNAL REVENUE SERVICE OF THE UNITED STATES OF AMERICA.
A non-passive Activity is an activity where the the tax payer take material or a substantial part in it.
BOTH THE COMPUTER CONSULTING BUSINESS AND THE APARTMENT BUILDING ARE NON PASSIVE ACTIVITES AS JON SPENDS A SUBSTANTIAL PART OF ITS ACTIVITIES OR MANAGEMENT.