Final answer:
Lucy's injury, characterized by immediate blistering, is a second-degree burn, which affects both the epidermis and the dermis layer of the skin.
Step-by-step explanation:
When Lucy develops blisters immediately after burning herself with hot oil, this indicates that the burn is more serious than a first-degree burn, which only involves redness and pain without blistering. Based on the information provided, Lucy's injury is classified as a second-degree burn, which not only affects the epidermis but also extends into the dermis layer of the skin. Second-degree burns are characterized by swelling, redness, and blistering, and they require proper wound care to prevent infection and promote healing. Therefore, the correct answer to the question is B) Second-degree burn.