IA3 Research Investigation Help

[jknow43]

Hi I've just received my IA3 and my chosen claim is:  Recombinant DNA Technology has made considerable improvements to the quality of human life.

I've also already come up with a research question which is: Is β-carotene found in the biofortification of Golden rice sufficient in improving Vitamin A Deficiency (VAD) for humans in developing countries, and hence reduces the risk of blindness?
 
I'm just struggling to connect the claim to my research question in the rationale. And what key information that should be in my background information. Thanks in advance!