Read the following context and choose the best option to answer the question.
Context: 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 .
Question: What were we hauling loads of before coming back for one of the horses ?
Options: 
A. mares
B. None of the above choices .
C. Fillies
D. Bovines


D