Final answer:
The question requires matching historical figures with phrases related to their defense of slavery in the antebellum South: William Harper with the Nullification Ordinance, George McDuffie with views on slavery and civilization, George Fitzhugh on slave owner virtues, Thomas R. Dew as the author of 'The Hireling and the Slave', and William Grayson for 'Cannibals All! or Slaves Without Masters'.
Step-by-step explanation:
The student's question relates to various historical figures and their perspectives or contributions to the pro-slavery argument in the antebellum South. To correctly match these individuals with the appropriate phrases: William Harper was associated with the South Carolina Nullification Ordinance of 1832; George McDuffie considered slavery an improvement over life in Africa; George Fitzhugh asserted that southern slave owners were virtuous and humane, describing slaves as 'grown up children'; Thomas R. Dew penned 'The Hireling and the Slave'; and William Grayson wrote 'Cannibals All! or Slaves Without Masters' which critiqued capitalist wage labor and compared it unfavorably to the condition of slaves.