Answer:
E. Atmosphere composed mainly of hydrogen and helium
Step-by-step explanation:
- As the Jovian planets are gas giants they are composed of the high-speed atmospheric flows , hosted by rapidly rotating planet . They have dense volumes of gas and are filled with the hydrogen and the helium gases and huge gravitation potential allows them to have large storms and have thick bands of clouds and also being far located from the sun they have retained their atmosphere for long periods.