to make it easier to test the prototype to reduce the cost of making the computer to make it easier to transport the computer to reduce the cost of building the prototype
I gave my students this multiple choice question: A company is designing a new laptop computer. The computer must not exceed a certain weight. Which of the following is the most likely reason to have a weight restriction for the computer?

Only one answer is correct among these 4 choices:
- to make it easier to test the prototype
- to reduce the cost of making the computer
- to make it easier to transport the computer
- to reduce the cost of building the prototype

Could you tell me which one is correct?

to make it easier to transport the computer