Regarding Handedness, Which of the Following Statements Is/are TRUE

Multiple Choice

Regarding handedness, which of the following statements is/are TRUE?

A) The finding that left-handed persons are more accident-prone may really be a result of having to live in a right-handed world.
B) Left-handed locomotive engineers have higher accident rates with a possible cause being that the locomotive controls were designed for the right hand.
C) The shortage of very old lefties may reflect that more left-handed children were forced to become right-handed, so the lefties are masquerading as righties.
D) All of these statements are true.