Choice ‘a’ is computer simulations. Parallel processing may be used in cases where the problem at hand can be broken down into a set of sub-problems that can be solved simultaneously. In computer simulations, the same task needs to be applied to a very large set of data. Therefore, it can run in parallel for several input data. Thus, choice ‘a’ is not correct.
Choice ‘c’ is weather modeling. Often, parallel processing is used in weather modeling in order to make weather forecasts. It is used to run computations over different regions around the world simultaneously. Thus, choice ‘c’ is correct.
Choice ‘d’ is graphics processing. Parallel processing may be used in graphics processing such as comparing many input images to a target image simultaneously. Thus, choice ‘d’ is not correct.
The correct answer is.