Question

A.
It was an atlas containing detailed maps of all known lands.
B.
It was an instrument used to show a ship's speed.
C.
It allowed sailors to better steer their ships.
D.
It helped explorers determine their position at sea.

Answer 1

where's the question?u only showed options

Answer 2

What is your question?

Answer 3

Could you post more info in down below or if it is better you can always post a screenshot of your work.