The term essential functions of a job, as used in the Americans with Disabilities Act $($ADA$),$ best refers to:

Multiple Choice

tasks so designated by an employer as ancillary to the achievement of the job's long$-$term goals.

tasks so designated by the Equal Employment Opportunity Commission $($EEOC$).$

those tasks that are required to be performed in case of any emergencies.

those tasks that are fundamental, and not marginal or unnecessary, to fulfillment of the job's objectives.