This makes it possible for developers to copy, modify, and share the linux program provided all changes are made public

a. creative commons
b. fair use agreement
c. gnu general public license
d. internet security act

solution:

the right option is a

to adding   a new row to a table we   have to do process last table cell and pressing tab.

this is the process to add new row in the cell:

* to add a row below the cell, click insert below in the rows and columns group.

thus this is the required right answer.