Of the Following Eyewitnesses to a Crime,who Would Probably Appear

Of the following eyewitnesses to a crime,who would probably appear most believable to a jury?

A) Teddy,a fifth-grader whose father is a lawyer
B) Randy,a radio announcer who appears very confident about what he saw
C) Moira,a retired teacher who has traveled widely to visit other countries
D) Dawn,a shy student who smiles and speaks very softly