A is the correct answer as it refers to philosophy that has developed in East Asia, mostly focused on the wisdom on the path or way that needs to be followed.
B is not correct as Confucius is a philosopher who put emphasis on morale.
C is not correct as Lao-tzu is actually a founder of Taoism.
The answer is logos. It is the appeal concerning
logical reason, therefore the speaker wants to present an argument that seems
to be comprehensive to the audience. It encompasses the content and point of
view of the speech. Like pathos and ethos the goal is to make a persuasive
outcome.