periodic dimming of the stars periodic X-ray bursts from the stars rapid location changes of the stars regular spectrum changes from the stars
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which observation provides evidence of the existence of planets orbiting other stars?
Possibilities:
- periodic dimming of the stars
- periodic X-ray bursts from the stars
- rapid location changes of the stars
- regular spectrum changes from the stars

periodic dimming of the stars