The correct answer to this open question is the following.
Although you forgot to attach the options for this question, we can say the following.
Based on the information in "Edward Jenner and the History of Smallpox and Vaccination," the author directly supports the claim that variolation became widespread in the colonies by giving information about Washington’s military decisions.
Scientists agreed that the work of Edward Jenner (1749-1823) is extremely valuable to stop the spread of diseases such as smallpox. Jenner was the creator of the first vaccine to prevent smallpox. He was an English scientist and is considered to be by many people the father or the initiator of immunology for the many lives he saved with his creation.
