The Difference Between a Topic and a Subject Is That

Multiple Choice

The difference between a topic and a subject is that: 

A) a topic is a narrow concept, whereas a subject is a broad area of knowledge.
B) a topic is a type of speech, whereas a subject is the base of a speech.
C) a topic interests an audience, whereas a subject does not interest an audience.
D) a topic needs technical knowledge to understand, whereas a subject can be understood easily.