Which of These Discoveries or Inventions Was Not Made in the Twentieth

question 6

Multiple Choice

Which of these discoveries or inventions was not made in the twentieth century?

• A) Stethoscope
• B) Cancer cells
• C) Penicillin
• D) Insulin

---

Definitions:

Maui

A tropical island in Hawaii, known for its stunning beaches, volcanic landscapes, and rich cultural heritage.

Adverse Selection

A situation in economics where asymmetric information results in high-quality goods or services being crowded out of the market by low-quality goods or services because of the inability of buyers to distinguish between the two.

Asymmetric Information

A situation where one party in a transaction has more or better information than the other, leading to an imbalance of power.

Low-quality Goods

Products that do not meet the expected standards of durability, performance, or satisfaction.