Question

Under which license is open-source software available?

A non-perpetual license
B. perpetual license
Ос.
GNU General Public License
D.
site license
O E
license with maintenance

Answer 1

GNU General Public License

Step-by-step explanation:

The GNU's General Public License is the most popular open-source license around. Richard Stallman created the GPL to protect the GNU software from becoming proprietary, and it is a specific implementation of his "copyleft" concept.