Is it possible to enter airspace C with a glider plane?

Question

Question Quiz SPL - Sailplane Pilot License - Air Law

QuizVDS · Accepted Answer

Yes, but only with approval of the respective ATC unit

QuizVDS · Answer

Yes, but only with transponder activated

QuizVDS · Answer

No

QuizVDS · Answer

With restrictions, in case of less air traffic

Id 64 - SPL - Is it possible to enter airspace C with a glider plane?