Getting "heads-tails-heads" and "heads-heads-tails" are equiprobable after 3 coin flips. But if I keep flipping a coin, I'm more likely to get one of these combinations than the other. Why is that?

a) The probability of each combination changes as more flips occur.
b) The law of large numbers guarantees that one combination will occur more frequently.
c) It depends on the specific properties of the coin.
d) There is no difference in likelihood between the two combinations.