<p dir="ltr" style="text-align: justify;"><span><span style="">What follows the be-verb “are” could be a noun, a present participle, or a past participle, but not a verb. </span></span></p><p dir="ltr" style="text-align: justify;"><span><span style="">(A) </span><span style="">remind</span><span style=""> - "remind" is eliminated since it is a verb. </span></span></p><p dir="ltr" style="text-align: justify;"><span><span style="">(D) </span><span style="">reminder</span><span style=""> - "reminder' is eliminated because the noun “reminder” is countable, and it refers to something that reminds someone to do something else that might be forgotten. However, employees are people, not things. </span></span></p><p><span><span style="">(B) </span><span style="">reminding - "reminding"</span><span style=""> is a present participle, indicating that the employees are actively reminding others to do something. But based on the meaning of the context, all employees are not doing the action “remind” themselves. Instead, they “are reminded” to do something. So, the correct answer should be a past participle, that is, Choice (C) </span><span style="">reminded</span><span style="">. </span></span></p>