Tu because If you put Mi or mis son rojos it says my are red which dosen't really make sense. Since you put tu in front of son (plual) it would be they are red.
Nos podremos ir de compras cuando hay grandes gangas en las tiendas
Where is the test? there is no picture.
A. open..The closest word to 'O' sounding in spanish is open
B, puedes ver el acento/tilde en la última vocal
