1)
This system would allow the trio of Schneiderlin, Schweinsteiger and Carrick to start and that would make the Red Devils very difficult to beat especially in the big games and this could appeal to van Gaal, who is hoping to win the Premier League this season.
The only problem with this is the lack of width going forward as Mata and Herrera are likely to stay central to provide support for Rooney in attack and would require a huge effort from the full-backs to get up and down the pitch.