Ava flipped a coin 2 times. What are all the possible outcomes in the sample space? Let T represent the coin landing tails up and H represent the coin landing heads up.

Each of the two flips can be heads (H) or tails (T), and the order matters. The possible sequences are TT, TH, HT, and HH. Therefore, choice D lists the complete sample space; choice C leaves out HT.

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