Final answer:
The claim that copyright law's duration has been extended from an original limit of 25 years to 35 years is false. The actual copyright term for works created on or after January 1, 1978, is the life of the author plus 70 years, with longer periods for certain types of works.
Step-by-step explanation:
The statement that copyright law has only been extended from its original limit of 25 years to 35 years is false. In fact, the current duration of copyright protection is significantly longer. For works created on or after January 1, 1978, copyright lasts for the life of the author plus 70 years after the author's death. In cases of joint authorship, the term extends 70 years after the death of the last surviving author.
For works made for hire, as well as anonymous or pseudonymous works, copyright lasts for 95 years from the date of publication or 120 years from the date of creation, whichever is shorter. These terms span well beyond the original copyright duration, actively protecting the rights of authors and contributing to incentive structures for innovation and creativity in various media including literature, music, and film.