Source code is software made available free for any third party to review and modify.
a. true
b. false

The correct answer is false. This is a definition for an open source. This is a computer software with its source code made accessible with a license in which the copyright holder offers the rights to study, change, and distribute the software to anybody and for any purpose. Source code on the other hand is the essential component of a computer program that is produced by a programmer. It can be easily understood and read by a human being. When a computer programmer types an arrangement of C language statements into Windows Notepad, for instance, and stores the sequence as a text file, the text file is said to hold the source code. 

i think the answer to your question is b. directive