in the 1920s, a method that enabled people to buy goods they could not afford was\no speculation.\no buying…

in the 1920s, a method that enabled people to buy goods they could not afford was\no speculation.\no buying on margin.\no installment payments.\no investing.
Answer
Brief Explanations:
In the 1920s, installment payments allowed people to purchase goods they couldn't afford upfront by making regular payments over time. Speculation is about risky financial bets, buying on margin is related to stock - market borrowing, and investing is a more general long - term financial activity. Installment payments were specifically for consumer goods purchases.
Answer:
installment payments.