Not that the back yard is anything more than a disaster zone at this point . Albeit slightly less of a disaster zone than the front yard . Of course during the grinding the neighbor 's sprinkler line was ground up , so I had to make an emergency trip to Ace to get some PVC pipe ( we had 3/4 " , the neighbor 's was 1/2 " ) and connectors to make that repair . The fence guy sort of took over as I was cleaning up the chewed ends of the existing pipe .

OPTIONS: [I] None of the above choices .; [II] Because they first tried to do the job themselves .; [III] Because they hired people that were clueless .; [IV] Because of the construction .;
Answer the following question: What may be the reason why the front and back yard was a disaster zone ?
[IV]