Everyone was surprised by this information and the light side couldn’t argue against this, because the Weasley family was a known light family. Muriel’s nomination was put to a vote and it passed and no one even dared to vote against that class, in order to not have the ire of the elderly woman. Warding could only be taken form fourth year with the expectations to have mid EEs or higher in ancient runes, arithmancy and an A in Latin in third year.