According to the 1980 revisions to the copyright act of 1976, . a. The owner of a copyrighted program is allowed to make multiple copies or adaptations for use on other computers
b. Copyright protection extends to original works of authorship in architectural fields
c. Copyright holders can perform a copyrighted work by means of digital audio transmission
d. Both people and organizations can be held liable for unauthorized duplication and use of copyrighted programs

d. Both people and organizations can be held liable for unauthorized duplication and use of copyrighted programs

Explanation:

1980 revisions to the copyright act of 1976 deals with various issues relating to copyright, including those relating to computer software.

However, amongst many of its codes and regulations, one of them is that the 1980 revisions to the copyright act of 1976 stipulated that" both people and organizations can be held liable for unauthorized duplication and use of copyrighted programs."

Hence, the correct answer is option B.

answer; /// the above statement is (true);

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.