The Mars Atmosphere and Volatile EvolutioN (MAVEN) space probe was designed to study the atmosphere of Mars. It was launched from Earth in 2013. The diagram below shows the orbit of both the MAVEN space probe and the moon Phobos around Mars.
Image courtesy of NASA
The image shown is not to scale. Which of the following best describes both Phobos and MAVEN?
A.
Their orbital path and speed both depend on Mars' gravity.
B.
Phobos and MAVEN both pull on Mars with the same amount of gravity.
C.
Phobos experiences gravity, but MAVEN does not.
D.
Their orbital path and speed both depend on Mars' rotation.