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 |
| --- | --- | --- | --- | --- | --- |
| K297AL | 107.3 | Dighton, Kansas | 170.0 | D | FCC |
| K236AM | 95.1 | Elkhart, Kansas | 170.0 | D | FCC |
| K207ET | 89.3 | Healy, Kansas | 75.0 | D | FCC |
| K239AX | 95.7 | Larned, Kansas | 170.0 | D | FCC |
| K211CH | 90.5 | Leoti, Kansas | 250.0 | D | FCC |
| K232DH | 94.3 | Ulysses, Kansas | 170.0 | D | FCC |
Question:
What class is assigned to frequencies lower than 90.5?
Answer:
D