SPLIT1) WORD AFTER COMMA SHOULD BE A NOUN SUCH AS "A TREATISE" BECAUSE THE WORD AFTER THE COMMA MUST ANSWER THE QUESTION: WHAT DID LUCRETIA PUBLISHED IN 1850? ANS: A TREATSIE. A AND B ARE OUT.
SPLIT2) PARALLELISM: "AND FOR CHANGES" AT THE END OF THE SENTENCE MEANS YOU THERE IS A LIST. THE PREVIOUS PART MUST BE PARALLEL => "FOR EQUAL POLITICAL" FITS WELL. C AND D ARE OUT.
SPLIT3) VER-ING MODIFIER => WORD "ARGUING" AFTER THE COMMA => THE VERB-ING
...
SPLIT2) PARALLELISM: "AND FOR CHANGES" AT THE END OF THE SENTENCE MEANS YOU THERE IS A LIST. THE PREVIOUS PART MUST BE PARALLEL => "FOR EQUAL POLITICAL" FITS WELL. C AND D ARE OUT.
SPLIT3) VER-ING MODIFIER => WORD "ARGUING" AFTER THE COMMA => THE VERB-ING
...
