Please answer the following question: Read the article and select the best answer. Article: All 20 children who died in a shooting at a school in Connecticut were aged between six and seven, according to an official list of the dead. The state's chief medical examiner said the gunman used a rifle as his main weapon, and all the victims appeared to have been shot several times. The gunman, named in media reports as Adam Lanza, killed his mother before driving to the school and opening fire. Six adults, all women, were also killed before the gunman shot himself dead. The head teacher at Sandy Hook school in Newtown, Dawn Hochsprung, is listed among the dead, along with adults Rachel DaVino, Anne Marie Murphy, Lauren Russo, Mary Sherlach and Victoria Soto. Eight boys and 12 girls were killed - all but four of them were aged six. The youngest, Noah Pozner, celebrated his birthday only last month. A woman who worked at the school was the only person to be shot and survive. Scores of people have left flowers at a memorial outside the school, and on Saturday evening hundreds attended a candlelight vigil . President Barack Obama is to visit Newtown on Sunday to meet families and speak at an interfaith vigil at the town's high school. After the attack, he urged "meaningful action" against gun crime in the US. "As a country we have been through this too many times," he said in an emotional White House address. Question: Among the student victims, how many are just six years old? Options: A: 12 B: 20. C: 4. D: 16
Answer:
D