Multicomp Company wishes to protect software it has developed. It is concerned about others copying this software and taking away some of its profits. Which of the following is true concerning the current state of the law?

a. Computer software is generally copyrightable.

b. To receive protection, the software must have a conspicuous copyright notice.

c. Software in human readable source code is copyrightable but in machine language object code is not.

d. Software can be copyrighted for a period not to exceed twenty years.