Final answer:
Finding a $10 bill on the ground is not a transaction as it lacks an exchange between parties, unlike the other options which involve receiving paychecks, selling stocks, buying apps or goods, which are all transactions.
Step-by-step explanation:
The correct answer to this question is A. Finding a $10 bill on the ground is not considered a transaction because a transaction involves a trade or exchange of goods, services, or funds between two parties. In this case, there is no exchange or trade happening. On the other hand, the other options B, C, and D do involve transactions: B. Getting a paycheck involves an exchange of labor for money, C. Selling stocks is trading ownership in a company for money, and D. Buying an app is exchanging money for digital goods. Additionally, buying a used laptop at a garage sale and ordering flowers over the internet also represent transactions.