Answer:
I too believe the best option to be letter B) Good being deadly is a paradox.
Step-by-step explanation:
A paradox is a statement that at first may seem to contradict itself or simply to be absurd. In some cases, after further investigation, the statement can prove itself true and well founded. Paradoxes can also be used to make fun statements or refer to absurd situations.
Usually, if something is deadly, we immediately assume it is bad. Poison is deadly, a gun shot can be deadly etc. It is, thus, paradoxical to affirm that something that is good is deadly. We are, however, capable of understanding that the person chooses to make such an absurd statement to convey a message with exaggeration. We can assume that, if this casserole is so good it's d-e-a-dly, it is absurdly good. So good, "you could die of happiness", or something of the kind.