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Which of the following could cause an increase in equilibrium price AND a decrease in equilibrium quantity of smartphones?
A successful advertising campaign for smartphones and new technology that decreases production time
A news report connecting smartphones to decreased performance on standardized tests and a government investigation that results in the closure of several factories
A decrease in the price of selfie sticks and a decrease in the wages of workers in the phone factories
A ban on smartphone use in the workplace as a result of decreased productivity and the entry into the smartphone market of several new manufacturers
Increase in federal access charges for phone service and elimination of environmental regulations that required smartphone factories to purchase pollution abatement equipment