In this sentence, the phrase "myriad of food options" implies that there were a large amount or great number of food choices available at the buffet. Therefore, the correct option from the given choices would be:
a. large amount/great number
Explanation:
1. The term "myriad" means a countless or extremely large number. So, when the sentence mentions a "myriad of food options," it indicates a wide variety or numerous choices available.
2. The use of "rather large buffet" further supports the idea that there was a substantial selection of food items to choose from.
3. Therefore, option a. "large amount/great number" is the most fitting description to capture the abundance of food options at the buffet.