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.

A portfolio on the capital market line with returns greater than the returns on the market portfolio represents a(n):
Option A:lending portfolio.
Option B:borrowing portfolio.
Option C:unachievable portfolio.

Answer: B