Final answer:
Sea marker dye lasts for about 1 hour and is best dispersed by simply deploying it in the water, where it will naturally disperse due to currents and wave action.
Step-by-step explanation:
The question is related to the duration and dispersion method of sea marker dye used in survival situations. Sea marker dye is designed to create a noticeable, contrasting color in seawater, thus assisting in the location of individuals in need of rescue. The correct answer is c. 1 hour, deploy in the water. Sea marker dye is formulated to last approximately an hour in the water, and it disperses naturally upon deployment due to water currents and wave action. There is no need to shake it vigorously or to stir it manually; rather, its effectiveness is maximized by just deploying it into the sea, where it will disperse on its own.