To his surprise,he found that__ travel could also be quite pleasent.A earth B land C ground D pain请问这道题因该怎么选择,请详解

To his surprise,he found that__ travel could also be quite pleasent.A earth B land C ground D pain
请问这道题因该怎么选择,请详解

land 陆地旅行

C
固定搭配，指地面旅行