astronomers want to study a star in the andromeda galaxy, the closest galaxy to our own. which instrument…

Brief Explanations:

A telescope is designed to observe distant objects in space by collecting and magnifying electromagnetic radiation such as light. Rovers are for exploring planetary surfaces, satellites have various functions like communication or Earth - observation but not the main tool for detailed study of a distant star, and orbiters are mainly for orbiting a celestial body to gather data about it. A telescope is the best instrument for studying a far - off star in another galaxy.

Answer:

B. telescope