"How many seconds?"
Translation:Cé mhéad soicind?
In the Questions lesson it says that cé mhead and cá mhead are interchangeable. However I selected both 'cá mhead soicind' and 'cé mhead soicind' from the three options here and was marked incorrect.
Only cé mhead is accepted.
Is there a reason why cé mhead is preferred or is this an error to be reported?