Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Opposing Team | Against | Date | Venue | Round |
| --- | --- | --- | --- | --- |
| Ipswich Town | 0.0 | 05/01/2008 | Portman Road , Ipswich | Third round |
| Plymouth Argyle | 1.0 | 26/01/2008 | Fratton Park , Portsmouth | Fourth round |
| Preston North End | 0.0 | 17/02/2008 | Deepdale , Preston | Fifth round |
| Manchester United | 0.0 | 08/03/2008 | Old Trafford , Manchester | Sixth round |
| West Bromwich Albion | 0.0 | 05/04/2008 | Wembley Stadium , London | Semi-final |
| Cardiff City | 0.0 | 17/05/2008 | Wembley Stadium , London | Final |
Question:
Which round has an Opposing Team of manchester united?
Answer:
Sixth round