I'll give you a question, please answer with step-by-step reasoning process. He liked to write every address out on an index card, then he would sort and store them in his what?
Options:
- office supply store
- library
- address book
- oral report
- card catalogue

The organized collection of cards is called card catalogue. He liked to write every address out on an index card, the he would sort and store them in his card catalogue.
The answer: card catalogue.