Respuesta :
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Blood is responsible for transportation of Oxygen in body which is the part of Cardiovascular system.
therefore, correct choice is :
- D.) Cardiovascular system
None of the above, the respiratory system is the network of organs and tissues that help you breathe.