Final answer:
The person is most likely doing some light reading on a Saturday afternoon based on the high frequency and low amplitude brainwave pattern of the EEG readout. Therefore, the correct option is A.
Step-by-step explanation:
This EEG readout indicates a high frequency (13-30 Hz) and low amplitude brainwave pattern. These beta waves are typically associated with awake and alert states of mind. Based on this pattern, the person is most likely performing Option A) Doing some light reading on a Saturday afternoon. This is because the brainwave pattern suggests a state of wakefulness and attention, which would be consistent with reading.