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meteorologists want to design a system of instruments that will evaluate ocean currents, air temperatures, and wind speed in order to predict catastrophic weather such as hurricanes and cyclones. before building a working system of the weather instruments, the scientists have built a prototype. using their prototype, scientists have collected data and used that data to predict changes in the weather.

the next step in deciding if their design is successful would be to
a) modify the design of their prototype.
b) redesign the prototype to be suit their needs.
c) change their basic ideas concerning the instruments.
d) use the data to evaluate the effectiveness of the prototype.