Sometimes a question "A" will be closed as a duplicate of question "B", where "B" is closed as a duplicate of a third question, "C". Thus the relationship looks like:
A -> B -> C
For a concrete example, consider:
A: Can I use a single resistor for multiple LED with different +ve sources?
B: Why do different colored LEDs interfere with each other when connected in parallel?
C: Why exactly can't a single resistor be used for many parallel LEDs?
Is this the commonly accepted way to close duplicates? I understand that Q&A quality, not age, of a question should determine which one is a duplicate of the other. In this case, C clearly has the best Q&A, judging by votes.
I can make an argument for any of the following strategies. Perhaps the correct strategy is one of the following, or perhaps there is no one-size-fits-all approach.
1. All other questions (A, B) should be closed as a duplicate of the highest-quality question, C.
This allows other users to clearly tell which question has the best answers at a glance. Users are not directed through a chain of duplicates, where such a chain could be confusing to new users. Finally, this helps collect all the good answers in C.
2. Newest questions (A) should be closed as a duplicate of both B and C.
Navigating to question A gives a link to both B and C. Why wierd capacitance values is an example of such a question with multiple duplicate targets. A user is given access to a (potentially) large variety of answers.
3. Keep as-is.
New questions (A) can be marked as duplicate of another duplicate (B). Similarly to argument 2. above, this gives a user access to a variety of potential answers, but in a different manner.
Is there a canonical best approach to these duplicates? Or, is there guidance in choosing which one of these approaches fits a given situation?