Read the excerpt from "Edward Jenner and the History of Smallpox and Vaccination.” However, the most successful way of combating smallpox before the discovery of vaccination was inoculation. The word is derived from the Latin inoculare, meaning "to graft.” Inoculation referred to the subcutaneous instillation of smallpox virus into nonimmune individuals. The inoculator usually used a lancet wet with fresh matter taken from a ripe pustule of some person who suffered from smallpox. The material was then subcutaneously introduced on the arms or legs of the nonimmune person. . . .
Which sentence from this excerpt states the central claim of the text?
However, the most successful way of combating smallpox before the discovery of vaccination was inoculation.
The word is derived from the Latin inoculare, meaning “to graft.”
Inoculation referred to the subcutaneous instillation of smallpox virus into nonimmune individuals.
The inoculator usually used a lancet wet with fresh matter taken from a ripe pustule of some person who suffered from smallpox.

click on your photo icon on top right and click edit profile you should be able to change it from there

the sentence that avoid faulty coordination is:

culture, which is well represented in philadelphia, plays a major role including theatre, music, and the visual arts.  

faulty coordination occurs when the writer gives equal importance two different ideas (clauses) which in fact are not equivalent. in order to correct a misplaced clause or idea, the writer can place less important or emphatic ideas in a relative clause as in the previous sentence.  

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.