沉香功能纳气平喘，治下列哪种喘最佳

A.肺气上逆的实喘

B.肺热痰多的咳喘

C.肺寒的咳喘

D.肾不纳气的虚喘

[A] boat
[B] bridge
[C] floor
[D] street
[E] window
[F] door
[G] garden

You sit in it to travel across water.