A survey of a random sample of 400 product owners shows that 33 returned the product.

A 95% confidence interval for the true proportion of product owners who return this product is

A.(0.056, 0.109). (correct)

B.(0.060, 0.105).

C.(0.047, 0.118).

D.(0,1).

Please show how they got this answer

we are not using excel. The long copy-and-paste image doesn't help me at a certain point. I need to do step by step with the formulas

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