关于慢性肺源性心脏病缓解期，下列哪种描述是正确的

A．肺动脉高压

B．右心室肥厚

C．明显肺气肿征

D．肺呼吸音减弱

E．PaCO₂明显升高

______ mother is a teacher at Beijing International School. [ ]

A. Tom's and Jim's                

B. Tom and Jim's

C. Tom and Jim                      

D. Tom's and Jim