Questão 30650

"This one" (line 54) refers to "document scanning service" (line 52).

"It's" (line 43) refers to "compact discs" (lines 42-43).

"Their" (line 35) refers to "applications" (line 33).

"Each one" (lines 25-26) refers to "document" (line 24).

"Others" (line 19) refers to "options" (line 17).