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:
| Call sign | Frequency MHz | City of license | ERP W | Class | FCC info |
| --- | --- | --- | --- | --- | --- |
| W294AJ | 106.7 | Charlottesville, Virginia | 21.0 | D | FCC |
| W236AD | 95.1 | Lawrenceville, Virginia | 25.0 | D | FCC |
| W246BZ | 97.1 | Crewe, Virginia | 38.0 | D | FCC |
| W254AH | 98.7 | Farmville, Virginia | 27.0 | D | FCC |
| W272CC | 102.3 | Smithfield, Virginia | 10.0 | D | FCC |
| W273AA | 102.5 | Blacksburg, Virginia | 10.0 | D | FCC |
| W274AB | 102.7 | Petersburg, Virginia | 30.0 | D | FCC |
| W291AJ | 106.1 | Waverly, Virginia | 27.0 | D | FCC |
| W292CU | 106.3 | Christiansburg, Virginia | 10.0 | D | FCC |
| W295AI | 106.9 | Marion, Virginia | 10.0 | D | FCC |
Question:
what is the class of the station with erp w more than 30?
Answer:
D