49. [ ] What is the passage mainly about?
(A) Promoting the benefits of blueberries.
(B) People should only eat superfoods.
(C) Introducing superfoods.
(D) A way to keep fit.
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統計: A(19), B(13), C(188), D(10), E(0) #1934951
統計: A(19), B(13), C(188), D(10), E(0) #1934951