I think all of these answers are good steps to a healthy decision but you had to choose one, I would choose B, you need to identify the situation before you can list your options or evaluate the decision or think about the consequences.
Intenta tomar descansos regulares al mirar una pantalla
Ponte de pie en lugar de sentarte cuando puedas
Planifique en algún momento activo cuando usted suele ser sedentario
Establecer límites de tiempo para el comportamiento sedentario.
I would say B. a patient who started a new exercise regimen
I say B because a patient need a reason to start a new exercise regimen, which means they are in a crisis to had to start a new exercise regimen
If it is just a normal check up then they would not have any way of knowing if you started your period or not.