Why does the author of "edward jenner and the history of smallpox and vaccination” most likely include dates when discussing jenner’s work to replace variolation? a) to show that time was important to jenner in relation to his work b) to show the many years it took for the vaccination to replace variolation c) to show why jenner was ridiculed for his work on the vaccination program d) to show how the british parliament slowly came to accept the value of the vaccination

The correct answer is option B) "to show the many years it took for the vaccination to replace variolation"  

Explanation:

In the article "Edward Jenner and the history of smallpox and vaccination" by Stefan Riedel, the author mentions that Edward Jenner continued his work on vaccination program despite of being the subject of attacks and ridicule. All Jenner's effort was rewarded once vaccination replaced variolation, which happened many years after Jenner started his investigations. The author mentions that variolation was prohibited in England in 1840, most likely to show how many years it took for vaccination replacing it, taking into account that Jenner started his work before 1800.