I would assume that your "Option C" is correct. The amount in 1099-B box 1e is the correct basis to report on your tax return, and the "original basis" is for your information. Keep in mind that the IRS gets only the actual 1099-B amounts, not the "additional information."
You could ask the broker or financial institution why the basis reported in box 1e is different from the original basis. You didn't say whether the box 1e basis is higher or lower than the original basis. If box 1e is higher it could have been increased because of a disallowed loss on a previous wash sale.
