Read the excerpt from one of Professor Martin Gilbert’s 88 history books. On October 1 [1918], as the British Expeditionary Force prepared to break through the final obstacles on the Hindenburg Line, and the Americans got ready to launch a new attack on the Argonne, Ludendorff begged the Kaiser to issue a German peace offer at once.

–The First World War: A Complete History,

Professor Martin Gilbert, Oxford University, 2014

Which descriptions characterize this source? Select three options.

biased

credible

factual

outdated

secondary

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