对在保修期限内和保修范围内发生的质量问题，( )。

A．由质量缺陷的责任方履行保修义务，由建设单位承担保修费用

B．由质量缺陷的责任方履行保修义务并承担保修费用

C．由施工单位履行保修义务并承担保修费用

D．由施工单位履行保修义务，由质量缺陷的责任方承担保修费用

—Could you please tell me _____________?

--“Rome wasn’t built in a day”. You should try to give it enough chances to become strong.

A．why I should do to have a good memory

B．what I can do to have a good memory

C．how can I do to have a good memory

D．what can I do to have a good memory