Which statement best describes the variability of leukemia presentation?

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Leukemia can show up in many ways because it disrupts the production of different blood cell types and can progress at different rates depending on the subtype. Some people develop symptoms quickly as the marrow fails to make enough red cells, platelets, or healthy white cells, leading to fatigue, pallor, easy bruising or bleeding, fever, and recurrent infections. Others have subtler signs or organ involvement, such as enlarged liver or spleen, swollen lymph nodes, bone or joint pain, or constitutional symptoms like night sweats and weight loss. In children, acute leukemias may present with fever and bone pain; in adults, chronic leukemias may cause fatigue, night sweats, and asymptomatic lymphadenopathy. Because these diseases span several subtypes with different growth rates and tissue involvement, the presentation is variable. The other statements are too limiting: leukemia is not confined to anemia alone, it does not affect only older adults, and many patients do not have identical symptoms.