The historians of geography and cartography seem more interested in their maps than in the explorers who went into the field, often at great risk, to get the information that these maps contain.
(A) explorers who went into the field, often at great risk, to get the information that these maps contain.
Seems okay, hold on.(B) explorers
that went into the field, often at great risk, to get the information these maps
containingExplorers must be represented with "who" and not "that". Besides, the sentence ends with "containing" but containing what?-B is out.(C) explorers
going into the field, often greatly risking, and
they got the information that these maps contain
"going" shows present continuous tense and "they" could be historians or explorers, so C is out.(D) explorers who went into the field to get the information that these maps
often contain at great risk.
The meaning is not clear at the end. It looks like its saying that these maps contain information at great risk. So, D is out. (E) explorers
often at great risk that were the ones who went into the field to get the information contained in these maps.
Unnecessary ambiguity in this option, E is out.Therefore, by POE, A seems to be the correct option.