This could be sorted under Observations or Inference in the scientific process/investigation
1. Yo doy una fiesta
2. Jaime y yo traeremos regalos
3. Marcos dirá a qué hora es la fiesta
4. Carmen y Marcos pondrán la Mesa
5. Ella va a aspirar
Actually the correct answer is D. tendrá. Because A would be if you were talking about yourself. B would be if you were taking about a group including yourself, and C would be right if you were talking about a group not including yourself.
