Which of These Correctly Characterizes the Composition of Jupiter's Cloud

Which of these correctly characterizes the composition of Jupiter's cloud layers?

A) hard surface just under the cloud layers, contrary to the understanding of Jupiter's atmospheric structure
B) no evidence at all of hydrogen in the atmosphere of Jupiter
C) vast quantities of invisible water vapor above the cloud layers
D) only traces of water vapor and many other chemical elements in the cloud layers that are very easily measured spectroscopically from Earth