To determine how many eighth notes are in the audio sample, you'd need to listen to the actual sample, as the number of eighth notes depends on its duration and tempo.
However, if the sample has a specified duration or tempo, you could calculate it as follows:
- Identify the tempo (beats per minute) and duration of the sample.
- Understand that each beat typically consists of two eighth notes.
- Multiply the number of beats by 2 to find the number of eighth notes.
Please provide more details about the sample or its duration and tempo for a precise answer! Based on the options you've given, only the actual sample will confirm how many eighth notes are present.