Which undefined geometric term is described as an infinite set of points that has length but not width? distance line plane postulate

I believe the answer would be B a line 

The correct answer is B) line. Distance can be measured over lengthand width. A plane is kind of like your floor compared to a bookshelf on it, they have area, which means they have length and width. A postulate is a different word for theorem, so it can't be correct. Keep in mind that line segments are not the same thing as a line.