Although the old man was ____ , but he didn’t feel ______. He had a dog as a company.

A．alone , alone

B．lonely , lonely

C．alone , lonely

D．lonely , alone

在厚度为30m的均质承压含水层中有一完整抽水井和两观测井，抽水井的半径为0.1m，观测井1，2至抽水井的距离分别为30m和90m。在井中进行抽水试验，抽水井涌水量为2500m³/d，当稳定时观测井1的降深为0.14m，观测井2的降深为0.08m，计算含水层渗透系数K接近于下列（）。

A.260m/d 

B.240m/d 

C.300m/d 

D.290m/d