Answer: D) Laura sat in on only one of Amanda's presentations prior to giving her the promotion.
Step-by-step explanation:
The Halo Effect refers to a scenario where a person lets the impression they get of someone or something in one area influence their perceptions of how that person or thing would react in another area.
If Laura indeed sat in on only one of Amanda's presentations prior to giving her the promotion and on this presentation, Amanda gave a stellar performance prompting Laura to believe that she was good in all her other presentations even if she wasn't then this would qualify for the Halo Effect.
Laura should have sat through more of Amanda's presentations to get a better impression of her before she promoted her.