In terms of reference, it is correct to affirm that...

A "Over 1,700 websites..." (line 18) – refers to the number of websites visited by college students in the US. B "...11.7 terabytes..." (lines 19-20) – refers to the volume of memory used in archiving the chosen websites. C "...96 percent of the websites..." (lines 20-21) – refers to the share of websites that were eliminated by students. D "...24 percent of the websites..." (lines 22-23) – refers to the websites considered extremely relevant by educational specialists. E "...68 web collections..." (line 26) – refers to the number of sites that were included in the archive.