Compare the student text with the source.
Source: Jennifer Armstrong, Shipwreck at the Bottom of the World, page 2. Published by Crown, 1998:
Antarctica had never even been sighted before the nineteenth century. Until then it was a rumour, an undefined, unseen question mark shrouded in fog and surrounded by ice.
Student text:
Prior to the nineteenth century, Antarctica was just ‘a rumour, an undefined, unseen question mark shrouded in fog and surrounded by ice’ (Armstrong 2).