To answer this question, you need to understand the main purpose of an informal review.
Option A) Inexpensive way to get some benefit - This option is correct because informal reviews are a cost-effective way to obtain some benefits. Informal reviews are less formal and less structured compared to formal reviews, which makes them quicker and easier to conduct. They can provide some benefits, such as finding defects, improving quality, and gaining understanding, without requiring a significant investment of time and resources.
Option B) Find defects - This option is incorrect because finding defects is one of the potential benefits of informal reviews, but it is not the main purpose. Informal reviews can help in identifying defects, but they also serve other purposes.
Option C) Learning, gaining understanding, effect finding - This option is incorrect because learning, gaining understanding, and effect finding are indeed some of the potential benefits of informal reviews, but they are not the main purpose. Informal reviews can provide opportunities for learning and gaining understanding, but they serve a broader purpose.
Option D) Discuss, make decisions, solve technical problems - This option is incorrect because discussing, making decisions, and solving technical problems are activities that can take place during informal reviews, but they are not the main purpose. Informal reviews are primarily focused on obtaining some benefit in a cost-effective manner.
The correct answer is A) Inexpensive way to get some benefit. This option is correct because the main purpose of informal reviews is to obtain some benefits in a cost-effective way.