I would disagree.
It is not always important to be noticed, because you don't have to depend on other people's approval. If you are satisfied with your accomplishments, why does it matter if someone else is going to praise you for them or not? You should be happy, regardless of other people's opinions and thoughts.
I could be wrong but this one seems to make the most sense so D. none
The variable is the group that was given caffine, because thats what the doctors manipulated. They possibly altered the natural memory of the participants by giving them caffine. A more specific variable could be how much caffine each participant is given and what time are they given it.
Answer:
It reaches its peek at 1, then begins to decrease until it reaches zero, but then rises back up to one before decreasing again
In short, international trade in livestock, poultry, and products to the US are very important because other countries are better equipped for certain products and goods. So international trade allows for the US to have access to those products and goods that may not be produced in the US at the demanded quantities and quality.
