What was the difficulty faced by Louis van Gaal and David Moyes at Manchester United? I- Maintaining the team's identity. II- Adapting to the club...

What was the difficulty faced by Louis van Gaal and David Moyes at Manchester United?

I- Maintaining the team's identity.
II- Adapting to the club's tradition.
III- Hiring new players.
IV- Playing offensively.
a) I and II are correct.
b) II and III are correct.
c) I and III are correct.
d) III and IV are correct.