im super sure thats...C....sorry if im wronh
Answer:
D. Cepheid Variable
Explanation:
RS Puppis is a Cepheid variable star, which varies in brightness, producing a light echo. A light echo occurs when light reflects off of surrounding objects, which delays its arrival to the observer.
I also took the test and got it right
Wrong subject
Kindly repost this question in math's subject section.
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North and West