-- is the restaurant from the post office?
-- It's about 5 minutes' ride.
A:How long
B:How often
C:How far
D:How many
“一个拥有几个封臣的封君本人也许就是更高一级封君的封臣,而更高一级封君又是一个更大关系网络中的封君手下的一名封臣。”与这一现象有关的是( )