What does "copious" refer to?

"Copious" refers to a substantial amount or a large quantity of something, often used in contexts where there is an abundance. It is commonly associated with discussions of text or discourse, where a copious amount of information means that there is a rich, extensive, or plentiful supply of details or ideas presented. This term conveys a sense of generosity in the amount being referenced, such as copious notes, which would imply a comprehensive and thorough collection of information. This understanding aligns with the first choice, which captures the essence of "copious" as being large in number or quantity.