Use the following to answer questions:
Refer to the diagram below, describing the locomotion activity of Drosophila melanogaster flies that have been subjected to various gene-knockout experiments. 
-What can we infer about the normal function of gene C?
Definitions:
Motor Vehicle
A self-propelled vehicle used for transportation on roads, such as cars, motorcycles, and buses.
Transportation Fuels
Fuels that are used to power various modes of transport, such as gasoline, diesel, and electric energy.
Comparison-Shopping Service
A comparison-shopping service is an online tool that allows consumers to compare the prices and features of products or services from different vendors to make more informed purchasing decisions.
European Union
A political and economic union of 27 European countries that are located primarily in Europe, aiming to ensure free movement of people, goods, services, and capital.
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