They both shared a vision of an "agrarian" American utopia, that is, relating to farms and farming. They believed their perfect land lies in the fields and with the workers and farmers.
After we found the theater
Your answer is the third option, he was golfing.
he will be golfing ⇒ "will be" indicates it has not yet happened, or is happening in the future, so this option is incorrect.
he is golfing ⇒ "is" indicates it is happening right now, or in the present, so this option is incorrect.
he was golfing ⇒ "was" indicates it already happened, or it happened in the past, so this option is <em>correct</em>.
he will have been golfing ⇒ is incorrect grammar usage, therefore making it incorrect as well.
I hope this helps and have a great rest of your day!