【单选题】

The author provides information that answers which of the following questions Ⅰ. How does the small area’s increasing density affect its gravitational field Ⅱ. What causes the disturbance that changes the cloud from its original static state Ⅲ. What is the end result of the gradually increas-ing concentration of the small area of gas

A、
A、Ⅰ only
B、Ⅱ only
C、Ⅰ and Ⅱ only
D、Ⅰ and Ⅲ only
E、Ⅰ, Ⅱ and Ⅲ