Which of the following experiments would most cleanly allow you to provide evidence that ambiguity aversion occurs?

If an experiment requires people be randomly assigned to two groups, A describes what task/choice you've given to group A, and similarly for B.

The Special Coin refers to a special weighted coin is introduced that flips heads with an unknown probability. However, if a Special Coin is flipped *after another coin*, it has a 75% chance of showing the opposite answer of the first flip. So if you flip two Special Coins, and the first flip is H, there's a 75% chance the second flip is T.

Select one:

a. Choose between winning $10 if a regular coin flips heads, or winning $10 if two Special coins flip HT

b. A: Choose between winning $10 if a regular coin flips heads, or winning $10 if the Special Coin flips heads.

B: Choose between winning $10 if flipping a Special Coin and then a regular coin gives HT (since the Special Coin went first, its special 75% thing doesn't matter), or winning $10 if flipping a Special Coin twice gives HT.

c. A: Choose between winning $10 if a regular coin flips heads, or winning $10 if the Special Coin flips heads.

B: Choose between winning $10 if the first two flips of a regular coin are HT, or winning $10 if the first two flips of the Special Coin are HT.

d. A: Choose between winning $10 if a regular coin flips heads, or winning $10 if the Special Coin flips heads.

B: Choose between winning $10 if you flip two Special Coins and then a regular coin and get HTH, or winning $10 if you flip three Special Coins and get HTH.