This bedroom is ____________. And that one is ____________.[ ]

A. your, my

B. yours, my

C. yours, mine

D. your, mine

无限大平行板电容器，两极板相隔5cm，板上均匀带电，σ=3×10^-6cm²，若将负极板接地，则正板板的电势为（）。

A.A

B.B

C.C

D.D