单选题 Don't fail to get medical attention for a jolt of electricity (for instance, from lightning, a power line, or home electrical cords), even if no damage is evident. An electrical bum can cause invisible (and serious) injury deeper inside the body. More than 500 Americans die every year from electrical burns.
Do go to the ER immediately.
Be sure to get medical attention for electrical burns even if there is no obvious damage because.

• A. there might be an invisible injury deeper inside the body.
• B. many Americans die each year from electrical burns.
• C. lightning is too much for a person to endure.
• D. electrical bums will always lead to serious injury inside the body.