-----------leukemia affects the bone marrow and develops gradually.

A.acute myelocytic
B. chronic lymphocytic
C.acute lymphocytic
D.chronc myelocytic
My answer is Chronic Lymphocytic

Leukemia is a type of cancer that affects the bone marrow, where blood cells are produced. It can develop gradually over time. There are different types of leukemia, distinguished by the particular type of blood cell affected and the rate at which the disease progresses.

To determine the correct answer, let's examine each option:

A. Acute myelocytic leukemia (AML) involves the rapid growth of abnormal myeloid cells. It is considered an acute type of leukemia, meaning that it progresses rapidly.

B. Chronic lymphocytic leukemia (CLL) affects the lymphocytes, a type of white blood cell. It is characterized by the gradual accumulation of abnormal lymphocytes and considered a chronic type of leukemia.

C. Acute lymphocytic leukemia (ALL) is characterized by the rapid growth of abnormal lymphocytes. Similar to AML, it is an acute type of leukemia.

D. Chronic myelocytic leukemia (CML) involves the slow growth of abnormal myeloid cells. It is considered a chronic type of leukemia.

Given the information you provided, your answer of Chronic Lymphocytic Leukemia (CLL) appears to be correct.