Matching words help locate guidance. Scope, definitions, related paragraphs, effective dates, and the transaction facts determine whether it applies.
A paragraph can use the same words while addressing a different transaction or reporting period. An example also needs to be read with its assumptions and related guidance.
Explanation can help, but it should not replace current governing authority.
An Accounting Standards Update explains changes but is not itself authoritative GAAP. Check the applicable Codification paragraphs and when the changes take effect.
Answer: a
Read the surrounding guidance and check whether it covers this transaction and reporting period. The final conclusion must connect the company's facts to the applicable paragraphs.