32) B

The text gives us the information that cannabis users are 41% more likely to have any psychosis.

If 1% of non-cannabis users develop psychosis, 1.41% of cannabis users in the sample will have psychosis.
In the second paragraph of the text, it is mentioned that about 20% of young people use cannabis.
20% of 10,000 = 2000 people

1.41% ≈ 1.40%
1.4% of 2000 = (1.40 ÷ 100) x 2000 = 1.4 x 20 = 28

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