Which of these groundbreaking scientific products faced the most controversy and regulatory challenges during its initial commercial launch in the 1980s?

In the world of scientific innovation, product launches can be transformative - but sometimes controversial. Major scientific breakthroughs often face scrutiny, regulatory challenges, or public concern when first introduced. This trivia tests your knowledge about a famous scientific product launch that sparked significant debate when it first appeared on the market. Can you identify which revolutionary product faced the most turbulent introduction?

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The first genetically modified food product (Flavr Savr tomato)
The first commercially available DNA fingerprinting kit by Cellmark Diagnostics
The first FDA-approved recombinant human insulin (Humulin)
The first commercial MRI scanner for medical diagnostics