John invited approximately 40 guests to his wedding, most of _______ are family members.

A．whom

B．that

C．them

D．which

对于知识管理和创造，个人的层次指的是个体被赋予行动的自由，通过试错的方式，使他们在行动与思维上，能凭借行动来厘清思维，然后通过思维使行动更具有意义。