Answer:
B) Trivially
Step-by-step explanation:
In trivial truth, the second statement should be true, whatever the first statement is. In this case, The first statement is that, "Whenever I eat meat I feel great". This statement could be true or false it doesn't matter. The second statement "Later, you discover that I'm a vegetarian" is true. The second statement is true as he knows the fact later that he is vegetarian. The second statement that, I am vegetarian, does not means that he cannot eat meat.
So this is the reason, if second statement is true it means that it is trivially proposition.