Answer: Shift the demand for gasoline right
Step-by-step explanation:
If it is announced that there'll be an increase in the prices of gasoline starting from the following month, this will bring about a situation whereby people will start rushing to buy gasoline before the following month when there will be an increase in its price.
In such case, there'll be a shift in the demand for gasoline to the right as there'll be an increase in the demand for gasoline.