You are a software developer who wants to start developing mobile apps for smartphones.
You have the option to develop apps for an open-source operating system. Which of the

following could persuade you to focus your development efforts on the open-source
operating system?

A.
The operating system and associated development tools are free, provided you comply
with the copy left license.

B.
Open-source operating systems and development tools are free from software bugs and
viruses.

C.
An open-source license will never be in the public domain.

D.
Source code for an open-source app is not viewable and cannot be modified.