The choice that would likely have the smallest impact on climate change among the options provided is buying apples that have no packaging. While reducing packaging can help to cut down on plastic waste and potentially reduce energy used in manufacturing and shipping that packaging, the overall carbon footprint of growing, harvesting, and transporting the apples tends to have a much larger impact on climate change.
In contrast, buying locally grown apples generally reduces transportation emissions, purchasing organic can promote sustainable farming practices, and buying in large quantities can help lower transportation emissions by reducing the number of trips made to the store. Therefore, while reducing packaging is helpful, the other options directly address larger contributors to greenhouse gas emissions.