If an Astronomer Were to Look at 1 Kilogram of Material

If an astronomer were to look at 1 kilogram of material taken from the surface of the Sun and 1 kilogram taken from the center, which of these statements would be true of the two kilograms?

A) Both kilograms have the same amount of hydrogen and are in fact mostly hydrogen.
B) The kilogram from the surface contains more hydrogen than the one from the center.
C) Neither kilogram contains any hydrogen.
D) The kilogram from the surface contains less hydrogen than the one from the center.