<prompt> Bhala okuqhubekayo kwalesi sigaba - Umhubhe waseMont Blanc ekuqaleni wawuphethwe yizinkampani ezimbili zokwakha. Ngemva komlilo ngo-1999  <response>: lapho kwafa khona abantu abangama-39, okukhombisa ukuthi ukuntuleka kokuxhumana kungaphazamisa kanjani ukuphepha komhubhe, yonke imisebenzi iphethwe yinhlangano eyodwa: i-MBT-EEIG, elawulwa yi-ATMB ne-SITMB ndawonye, ngokusabalalisa amasheya angama-50 50. 