19. Which statement is most likely true based on the article?
(A) Pancreatic cancer only affects older adults.
(B) Scientists believe MAP4K2 may help improve future cancer treatments.
(C) Anti-PD-1 therapy may be harmful to the immune system.
(D) The new treatment is already widely available in hospitals.

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統計: A(0), B(4), C(0), D(0), E(0) #3910955