Odpowiedź: 

c. Dave's neighbour

Uzasadnienie odpowiedzi:

Dave mówi swoim kolegom, że jego sąsiad, pan Morris jest ogrodnikiem:

Dave: Well, no, but I was playing playing football with my brother in the park when I saw my neighbour, Mr Morris.
...
Dave: No, he wasn't playing football, he was planting flowers! He's a gardener there.