Hi there,
I believe the correct answer is A. Five!
He wanted to build an aggressive military force, including changes in leadership, without the nobles' interference. I hope this helps :)
We feared the "Cold War" and Cuba.
The meaning of this quote "A leader is best when people barely know he exists; when his work is done, his aim fulfilled, they will say; we did it ourselves" means if the leader is unknown to many people once he has finished or achieved a remarkable goal other people (such as Laozi) can steal the glory and be remembered for something they didn't do.
