You Have Been Asked to Simulate the Process of "Flipping

Multiple Choice

You have been asked to simulate the process of "flipping" two identical, unbiased coins. What is the probability of the outcome where one coin is heads and the other is tails? (Hint: Once the coins are flipped it is impossible to tell which is which.)

A) 0.10
B) 0.25
C) 0.45
D) 0.50
E) 0.75