Question

in the 1950s, jetpacks could stay in the air for only 30 seconds. people today have not started using jetpacks and hoverboards yet.

Explanation:

To determine the correct statement, we analyze each option:

• The first statement: "In the 1950s, jetpacks could stay in the air for only 30 seconds." This is a factually accurate statement about the capabilities of jetpacks in the 1950s.
• The second statement: "People today have not started using jetpacks and hoverboards yet." This is incorrect because there are people today who use jetpacks (e.g., in some professional or recreational contexts) and hoverboards are also in use.

Answer:

A. In the 1950s, jetpacks could stay in the air for only 30 seconds.