From the graph that we have here, the factor that can cause the demand to shift from d1 to d2 is option D.
What is demand?
This is the term that is used to refer to the number of persons that need a particular product in an economy. It refers to the number of people that are willing to buy a product at the given price that the product is being sold.
In the last option, we can see that the number of buyers for the product are on an increase. This means that these people are willing to buy this product at the particular price at which it is sold.
Read more on demand here: https://brainly.com/question/1245771
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