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 |
| --- | --- | --- | --- | --- | --- |
| KNGM | 88.9 | Guymon, Oklahoma | 25000.0 | C3 | FCC |
| KJOV | 90.7 | Woodward, Oklahoma | 25000.0 | C2 | FCC |
| KJHL | 90.9 | Boise City, Oklahoma | 10000.0 | C3 | FCC |
| K229AV | 93.7 | Alva, Oklahoma | 170.0 | D | FCC |
| K204FY | 88.7 | Fairview, Oklahoma | 50.0 | D | FCC |
| K202DC | 88.3 | Shattuck, Oklahoma | 230.0 | D | FCC |
Question:
Frequency MHz of 93.7 has what class?
Answer:
D