The lifeblood of a successful futures market is ______.A．big institutions responsible for their own risksB．fairly sizeable firmsC．independent firms of a few individuals trading for their own accountD．none of the above
题目
The lifeblood of a successful futures market is ______.
A．big institutions responsible for their own risks
B．fairly sizeable firms
C．independent firms of a few individuals trading for their own account
D．none of the above