Which One of These Statements About All Four of the Giant

question 225

Multiple Choice

Which one of these statements about all four of the giant planets is true?

• A) The giant planets are almost entirely made up of hydrogen and helium; only about 1 percent of the planets' mass is made up of heavier elements.
• B) The giant planets are thought to have substantial rocky cores.
• C) Liquid metallic hydrogen makes up a large part of the interiors of the giant planets.
• D) The spin axes of the giant planets are all approximately perpendicular to their orbital planes.

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