It's kinda like an educated guess.
The introduction of iodized salt in the 1920's dramatically<span> reduced rates of goiter</span> in the United States. This rapidly reduced the incidence of iodine deficiency. The United States and Switzerland were the first two countries to introduce the use of iodized salt to their country.
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I think is either A or B i hope this helps!:)
This question has tricky answers. A is surely not the correct one, neither is D.
Both B and C could be the correct answer, however, foreign policies rarely have no effect on the domestic policies of a country in this globalized world.
For that reason I'm inclined to say that the correct answer you're seeking for is C - people could be worried whether they will affect their jobs and businesses.
However, stating the answer like this might be a bit paranoid. It's more likely that it will affect them positively as it's not in the interest of a country to negatively punish its citizens.
