The scientific discovery of radioactivity was intended to help doctors on the battlefield during World War I. Which of the following scientists was responsible for this discovery?

A. Louis Pasteur
Incorrect. Louis Pasteur developed a process of preserving food and beverages.

B. Albert Einstein
Incorrect. Albert Einstein was responsible for the atomic bomb that ended World War II.

C. Marie Curie
Correct! Marie Curie discovered radioactivity used for x-rays to assist doctors on the battlefields in World War I.

D. James Watt
Incorrect. James Watt was a Scottish inventor who improved the steam engine.

Which of the following best describes the impact of the Gatling gun in World War I?

A. It was the first artillery piece used in war.
Incorrect. The Gastraphetes was the first artillery piece believed to be used in war.

B. It killed more men at a faster rate.
Correct! The Gatling gun fired 200 rounds per minute.

C. It allowed projectiles to travel longer distances and more efficiently.
Incorrect. This describes the impact of iron muskets.

D. It provided armored protection to soldiers who were located inside.
Incorrect. This describes the artillery tank.

The process of removing bacteria from food and beverages was developed by which of the following?

A. James Watt
Incorrect. Watt improved the technology of the steam engine.

B. Marie Curie
Incorrect. Curie discovered radioactivity.

C. Thomas Edison
Incorrect. Edison secured more than patents for his inventions, but he did not create this process.

D. Louis Pasteur
Correct! Louis Pasteur developed this process, which is called pasteurization.

Which of the following is an example of an economic impact of industrialization during the 19th century?

A. The cost of goods and raw materials were lowered.
Correct! This is an example of an economic impact of industrialization.

B. Living conditions were unsanitary.
Incorrect. This is a social impact of industrialization.

C. Urbanization increased.
Incorrect. This is a political impact of industrialization.

D. Immigration increased.
Incorrect. This is a political impact of industrialization.