Final answer:
The amber 'FLT SPLRS' message on the EICAS indicates that the flight spoilers are deployed, which is used to increase drag and reduce lift.
Step-by-step explanation:
The message FLT SPLRS displayed in amber on the EICAS (Engine Indicating and Crew Alerting System) page typically indicates that the flight spoilers are deployed. However, since response options were provided, we must choose the correct one based on standard aircraft systems operation. The correct answer is, therefore: a) Spoilers deployed. This indication usually means that the spoilers on the wings have been extended into the airflow to increase drag and reduce lift, which can be used to help slow the aircraft down or increase its descent rate.