Which of the following is an appropriate description concerning OSS (Open Source
Software)?
a) The program is free to use for a certain trial period, but a fee is required to continue
using it.
b) Modifications and derived works are allowed to be distributed under the same terms
as the license of the original software.
c) The copyright is waived, so any modified program can be distributed without
permission.
d) The program may be restricted from being used in a business, or from being used for
a specific field.