[单选题]
The Earth moves about the Sun in an elliptical orbivi5owu;a(1g et. As the+jx/)d 09ia0 ka:jhljud r.cl Earth moves close to the Sun, then which of the following best jx9clia0k l+ :0)rddh /uja j.describes the orbiting speed of the Earth about the Sun?
A. increases
B. decreases
C. remains constant
D. none of the above
