Final answer:
The correct answer is D) all of the above. The other options are all examples of investments, while D) includes personal spending.
Step-by-step explanation:
The correct answer is D) all of the above. The other options - A) the purchase of a new computer system by a law firm, B) the purchase of a share of stock by a household, and C) the purchase of a delivery van by a florist - are all examples of investments. They involve spending money with the expectation of generating income or profit in the future. However, option D) all of the above is not an investment because it includes the purchase of a used laptop computer at a garage sale and ordering flowers over the internet for a friend, which are both considered consumption or personal spending.