a nonresident alien who derives income (that is otherwise not effectively connected) from real property located in the U.S. and held for the production of income may elect to follow which treatment?

A) All income from the real property as effectively connected with a U.S. trade or business.

B) All income from the real property as foreign-source income.

C) All income from the real property as capital gain.

D) Part of the income as effectively connected and part as capital gain.