Answer:
The most likely cause of this disease is that siblings have a variable expression of this disease.
Explanation:
Neurofibromatosis 1 is an autosomal dominant disorder, even though it is a very rare disease to occur. This dominant nature causes this disease to be expressed even in people who have heterozygous alleles for it, which makes it easier for siblings to have this disorder, since only those who are hom0zygous recessive would not present it. However, the expressiveness of the disease may vary between siblings, as is the case shown above, where although the two siblings have the same disease, they present it in different ways.
Because, a free market, by the very nature of the thing, is always fair. A free market simply means that individuals and companies are free to trade (or not trade) with one another. ... The parties concerned trade money in exchange for products or services because they believe they are better off by doing so.
The answer for your question is one that's "A)"
The governments could contribute towards this by providing an affordable -good quality welfare systems for its citizen.
By doing this, a country could guarantee its citizens some sort of life insurances that is free (or low cost) by creating some sort of tax distribution to be allocated into the welfare funds
