Answer
3. He was given carte blanche to teach the new staff using whatever methods he liked.
πββοΈ carte blanche
Meaning
If you give someone carte blanche, you give them freedom to do whatever they want in a situation.
For example
- The boss has given us carte blanche to redecorate the offices.
- The president gave his generals carte blanche to fight the war however they wished.
Origin: Originally borrowed from French. A literal translation would be "white (or blank) paper".