Step 1: Rules of interpretation.
- Defined terms have precise boundaries — their “limits” are set by the definition clause. Saying “no limits” contradicts this principle.
Step 2: Evaluate other options.
(a) Correct — marginal notes/titles cannot curtail substantive provisions.
(b) Correct — they may be used as internal aids to interpretation.
(d) Correct — punctuation can aid interpretation when ambiguity exists.
\[
\boxed{(c)}
\]