The lesson suggests that the use of adónde vs dónde is dependant on whether a verb of movement follows.
However, in a Kwiziq question "Luis me dijo _______ había ido de vacaciones" we are only given the options donde or dónde. But 'ir' seems to suggest adónde (Luis told me to where he went).
So, is it that 'ir' is in past perfect here (and that the movement is finished) that 'adónde' is not a valid option in this case?
Saludos