Which of the following is true about new foreign treaties? a: they prevent the formation of alliances with other countries. b: they do not have an effect on the domestic policies of a country. c: people could be worried whether they will affect their jobs and businesses d: people do not care about them or whether lawmakers will approve the agreements.

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.