for mar sí------i typed " as she is too young"----Rejected. I understood "as" to be acceptable in this situation. I would appreciate your views, le do thoil.
mar means 'as' in the sense of 'she works as a teacher'. However, I feel it probably should be accepted, since it's basically synonymous with 'because'
In this exercise, mar is a conjunction, and the conjunction “as” is a valid translation of it.
It is also my sense that "as" would be the appropriate word to use here. I tried it, and found that the problem has now been corrected.