Read paragraphs 3 and 4.

(3) To determine a spacecraft's distance from Earth, navigators send a signal to the spacecraft, which then returns it to Earth. The time the signal requires to make that two-way journey reveals the spacecraft's distance from Earth because the signal travels at a known speed (the speed of light).
(4) While it may sound complicated, most of us use this concept every day. The grocery store might be a 30-minute walk from your house. If you know you can walk about a mile in 20 minutes, then you can calculate the distance to the store.

How does the author help readers understand the method scientists use to determine a spacecraft's distance from earth?

A. She uses an analogy that relates the idea to readers' lives.
B. She provides a humorous anecdote to hook readers' interest.
C. She gives a detailed explanation of how the method was developed.
D. She tells a story that allows readers to imagine earth as seen from space.

The way the author helps readers understand the method scientists use to determine a spacecraft's distance from earth is A. She uses an analogy that relates the idea to readers' lives.

What is an Analogy?

This refers to the comparison that is done to show the similarities that exist between two or more entities.

Hence, we can see that from the given narration, the speaker talks about the measurement of distance in space and then narrates with an everyday experience to show how distance is calculated.