TOEFL Reading: ETS-TOEFL阅读机经 - S55_CVA71O723Z77L$

According to paragraph 3, Milankovitch's theory holds that periods of glaciation result from a particular combination of changes in all the following EXCEPT A. the shape of Earth's orbit B. the inclination of Earth's axis C. the wobble of Earth as it spins D. the amount of time required for Earth's rotation around the Sun