Its d you could have looked it up on google images
Answer:
Scientists can use the wobble to work the planet's mass and the distance from the star.
Explanation:
Detecting a star's wobble is one way to find out if there are planets orbiting it, this happens because the planet is “tugging” on it, the gravitational force from the star acts to keep the planet in orbit, and the gravitational force from the planet acts to move the star as the planet orbits. Scientists can use the wobble to work the planet's mass and the distance from the star.
Considering this information we can conclude that the correct answer is distance to the planet and mass of the planet.
I hope you find this information useful and interesting! Good luck!
