I believe the answer is: interact with other countries.
In general, countries preference of choosing their foreign policies are divided into two main approach.
The interventionists tend to like to be involved in other countries affair and provide help for those who they considered as 'ally'. The neutralists tend to like to stay away from other countries' affair and focus on their country's own development.
The correct answer would be option D, Derek takes his dog outside on a fixed schedule and promptly gives him a treat for urinating outside.
Derek is frustrated that his one and a half year dog does not let him know when he needs to go outside to urinate.
Explanation:
According to the psychology, when a person does something good and is given reward for doing that, then his that behavior is reinforced and he is likely to do the same thing again and again to get himself rewarded.
Similarly if a person gets punishment of doing something, then his that behavior is likely to disappear.
So when Derek takes his dog outside on a fixed schedule and promptly gives him a treat when the dog urinates outside, the dog learns to urinate outside for the reward. His this behavior is reinforced through the reward.
Learn more about Rewards and Punishment at:
brainly.com/question/13164841
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C. There are already enough stem cells
The yearly sum of goods and products produced in a country is called the gross national product. The correct option among all the options given in the question is option "b". This is also sometimes referred to as Gross Domestic Products or GDP. It is actually a measure of the total countries yearly national economic activity. GDP shows the value of the products created nationally within a stipulated time frame.