Question

Steve wrote the sentence shown below.

“If two lines intersect, then exactly one plane contains both lines.“

Which of these statements is true about what Steve wrote?
Answer
It is a postulate because it is a true statement which can be proved.
It is a theorem because it is a true statement which can be proved.
It is a theorem because it is a statement which is assumed true without proof.
It is a postulate because it is a statement which is assumed true without proof.