(2013·乌鲁木齐高三第一次诊断性测验)If we work with a strong will, we can overcome any difficulty, ________ great it is.

A．what

B．how

C．however

D．whatever

在外派船上，船员只有牢固树立服从意识，妥善处理与船舶所有人的关系，才能适应工作。