Which of the Following Statements Is True, Concerning the Sourcing

Which of the following statements is true, concerning the sourcing of income from inventory produced by the taxpayer in the United States and sold outside the United States?

A) Because the inventory is manufactured in the United States, all of the inventory income is U.S. source.
B) If title passes on the inventory outside the United States, all of the inventory income is foreign source.
C) The taxpayer may source one-half the income based on title passage and one-half the income based on where the sale negotiation takes place.
D) The taxpayer may source one-half the income based on title passage and one-half the income based on location of production assets.