Step 1: Generations of Human Rights.
- First-generation: Civil and political rights.
- Second-generation: Economic, social, and cultural rights.
- Third-generation: Collective or solidarity rights.
Step 2: Examples of third-generation rights.
These include the right to self-determination, right to development, right to a healthy environment, and rights of future generations.
Step 3: Elimination.
(a) Cultural rights are second-generation.
(c) Digital rights are emerging rights, not part of the traditional generational classification.
(d) Economic rights are second-generation.
\[
\boxed{(b)}
\]