We each hauled a load and came back for the last one and the horses . We did n't have lunch until five but he treated me at the truck stop on the way home from town . This morning we went in a watched them sell . 31 heifers weighed an average of 820 pounds and brought $ 775 a head .

Q with options: Give answer the following question using evidence from the above passage: What were we hauling loads of before coming back for one of the horses ?
Options:
(I) Female young cows ..
(II) Fillies.
(III) None of the above choices ..
(IV) mares.
(I)