Read the following article and answer the question by choosing from the options.

Roland took the kids shopping for school supplies . He came back miserable that he had spent $ 100 . The kids wanted these fancy binders , and mechanical pencils , and Gary wanted a little white board to write his assignments on . Then he just bought erasers and notebooks and stuff .

Why was Roland so upset ?
Options are: -- Because while they were shopping , the kids had been unruly. -- Because the kids had misbehaved in the store and knocked things over. -- Because the children had been hard to control while shopping. -- Because he had not meant to spend so much....A:
Because he had not meant to spend so much