[单选题]

Of the items listed below, which one(s) should be saved into the process control block?
Ⅰ.Process name and process number
Ⅱ.Process running information
Ⅲ.Current opened file information
A．Ⅰ and Ⅱ
B．Ⅰ and Ⅲ
C．Ⅱ and Ⅲ
D．Ⅰ、Ⅱ and Ⅲ

Of the items listed below, which one(s) should be saved into the process control block?Ⅰ.Process name and process numberⅡ.Process running informationⅢ.Current opened file informationA．Ⅰ and ⅡB．Ⅰ and ⅢC．Ⅱ and ⅢD．Ⅰ、Ⅱ and Ⅲ