What does the next instructions?

LDR R$0,$ GPIO$\_$PORTA$\_$DEN$\_$R

MOV R$1,0$xF$0$

STR R$1[$R$0]$

This procedure enables the digital pins $3,2,1,$ and $0$ of port $A$

This procedure disables the digital pins $7,6,5$ and $4$ of port $A.$

This procedure enables the digital pins $7,6,5$ and $4$ of port $A.$

This procedure enables the Port A as input