50.Based on the passage, how much did the percentage of UK adults who believed vaccine risks were hidden increase from 2019 to 2024?
(A) 5 percentage points
(B) 11 percentage points
(C) 19 percentage points
(D) 30 percentage points
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統計: A(0), B(7), C(1), D(0), E(0) #3427208
統計: A(0), B(7), C(1), D(0), E(0) #3427208