Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

With regard to net present value (NPV) profiles, the point at which a profile crosses the vertical axis is best described as:
Option A:the point at which two projects have the same NPV.
Option B:the sum of the undiscounted cash flows from a project.
Option C:a project's internal rate of return when the project's NPV is equal to zero.

Answer: B