| Which statement concerning frequency band selection and propagation most corresponds with standard practice. |
| A) Maximum Usable Frequency (MUF) and Optimum Usable Frequency (OUF) should be calculated prior to setting up the transceiver. |
| B) Propagation rules, Sunspot cycle status and seasonal variations (winter & summer) must always be employed to calculate the proper band selection. |
| C) Propagation "rules of thumb" are usually sufficient for routine operations. |
| D) Propagation "rules of thumb" should be combined with Solar flare alerts to determine band selection. |
