Bill Jone's parents insisted that Bill buy himself a new sport shirt. Bill's father gave specific instructions, saying the shirt must be in "good taste", that is, neither too wildly colored nor too extreme in tailoring. Bill found three types of sport shirts in the local department store:

Rather somber shirts that bill's father would want him to buy.

Good-looking shirts that appealed Bill.

Weird shirts that were even too much for Bill.

He wanted a good-looking shirt but wondered how to convince his father to let him keep it. The clerk suggested that Bill take home two shirts for his father to see and return the one he did not like. Bill selected a good-looking blue shirt he liked, and also a weird lavender shirt. His father took one look and insisted that Bill keep the blue shirt and return the lavender one. Bill did as his father instructed. What was the key decision in this decision process, and who made it?