The answer is a) Dice because it has the usted ending. Digo is the yo ending. Dicen is the ustedes ending. Decimos has the nosotros ending.
1. Vosotros
2. Nosotros
3. Vosotros
4. Ellas
5. Él
6. Ellos
7. Ella
8. Ellos
9. Vosotros/Ustedes*
10. Vosotros
* The second one is the formal way because it says "Mr. Rodriguez and you", but I don't know if you have learned it so I leave you both ways. The first one would be if it was just "*<em>Rodriguez's name</em> and you".
