You complete one Part 1 for the mother and mark 2a. You complete one Part 1 for the daughter and mark 2c.
If you hover your mouse over the boxes, it will show a pop-up explanation box that tells you how to complete the Part 1 information when more than one option applies.
_________________________
I can't herd the cats anymore, so I just set up the electric fences and let them fry when they stray out of bounds.