What do the four outer planets have in common?
OA. They are much larger than Earth and are made mainly of hydrogen and helium.
OB. They are about the same size as Earth and are made mainly of hydrogen and helium.
O C. They are much larger than Earth and are made mainly of iron.
O D. They are about the same size as Earth and are made mainly of iron.
OA. They are much larger than Earth and are made mainly of hydrogen and helium.
OB. They are about the same size as Earth and are made mainly of hydrogen and helium.
O C. They are much larger than Earth and are made mainly of iron.
O D. They are about the same size as Earth and are made mainly of iron.