In analogy questions, first pin down the {relation type} (here, object $\to$ appropriate action) and enforce {part-of-speech parallelism}. Beware homophones: {cite} (quote/mention), {site} (location), {sight} (see/vision). Only “{cite references}” is correct usage.
1) Identify the relation in the second pair.
“Guidelines : Implement” expresses an object $⇒$ appropriate action relation. The noun “guidelines” is something that you implement. So we look for a verb that is the correct action you perform on “references.”
2) Collocation/usage test for each option. (A) Sight: “Sight” is primarily a noun (vision) and as a verb means “to see/spot” (e.g., “to sight land”). We do not “sight references” in academic or professional English.
(B) Site: Homophone of “cite”, but “site” is a noun meaning “location/place,” or a verb meaning “to place/locate.” “To site references” is incorrect. This option is a common trap based on sound-alike words.
(C) Cite: Verb meaning “to quote/mention as evidence or authority; to reference explicitly in a text.” In writing, we cite references. This perfectly mirrors “implement guidelines.”
(D) Plagiarise: Verb meaning “to copy another’s work/ideas and pass them off as one’s own.” This is the opposite of proper use of references; you avoid plagiarising when you cite references. Hence not the intended action.
3) Part-of-speech parallelism.
The pair should keep the same parts of speech: Noun : Verb. “Guidelines : Implement” (Noun : Verb) $⇒$ we need a verb for “References : .............” Only cite fits both meaning and grammar naturally.
4) Final mapping.
\[
\text{References : \textbf{Cite}} \; :: \; \text{Guidelines : \textbf{Implement}}
\]
Both pairs express “perform the correct action on the given object.”
\[
\boxed{\text{(C) Cite}}
\]