Ahistorian is interested in learning about the ancient roman coliseum, an arena where trained combatants fought each other for spectator entertainment. many gladiators were slaves who were forced to fight to the death with other people and even wild animals. the historian has difficulty understanding how anyone could enjoy, or even tolerate, seeing such things! the historian concludes that ancient roman culture must have been significantly more tolerant of violence and slavery than modern american culture. this conclusion is an example of what historical skill?

a. access to primary sources
b. use of contextualisation
c. establishing the point of view
d. detection of bias