Chars or Graphs are the most common. You could also use Venn diagram or pie chart.
Oral means "spoken instead of written,by word of mouth." So the most likely answer is C. it's recited from memory. Examples of that would be Greek mythology,folklore,or legends. For the hundreds of years those were mainly passed down by word of mouth, from memory.
It tell you in the name fragments are bits and pieces of the whole, so sentence fragments are pieces of the full sentence.
3. Dr cart and the neighbors