The answer is d. The kidneys help process your blood and collect all of the waste and extra fluids from it. The bladder helps secrete these wastes and extra fluids from the body and that's why they are apart of the excretory system.
The correct answer is D, which includes the kidney and bladder, two vital organs in the excretory system. The kidneys filter waste from the blood to form urine, while the bladder stores this urine until it is excreted. Together, they help regulate the body's waste elimination processes.
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