Which sentence is correctly punctuated? 1. Katie and Melko who are both avid readers, have been chosen for the varsity volleyball team.
2. Ted and David, brothers to Elaine are both forwards on the basketball team.
3. The entire freshman class having mostly boys must eat lunch in the cafeteria each day.
4. Much of the new building, which was built over a ten-year period, is already overcrowded.

Sentence number 2. The other sentence should have a comma

Explanation:

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.