Answer:
C. An oyster
Explanation:
If the narrator says that he/she is daring to do something is correct to say an oyster. Peach, is a common fruit, a biscuit a something delicius that we assume that the narrator has eaten. The same happens with tea cakes which are not a dare because people usually eat tea cakes in the afternoon or in the morning. So in this case an oyster is a dare for the narrator.
