Mark the letter A,B,C, or D on your answer sheet to indicate the correct arrangement of the sentences to make a meaningful paragraph/letter in each of the following questions.

a. Firstly, the process of invention often involves identifying a problem or need in society.

b. This is followed by brainstorming ideas and conducting research to find possible solutions.

c. Once a viable solution is conceptualized, inventors move on to prototyping and testing their invention.

d. Invention is a crucial driver of progress and innovation in society.

e. Finally, after refining the invention based on feedback and testing results, it can be brought to

market or implemented for practical use.