The secretary had the information at her fingertips. 

Do not lose your head in public. 

To let off steam my friend started murmuring 

Regardless of what her parents said, she wanted to let her hair down that night. 

In the following question, out of the four alternatives, select the alternative which is the best substitute of the phrase.

A person’s last performance

My sincere advice to my maidservant fell on stony ground. 

Adolescence is a period of halcyon days. 

She didn't realize that the clever salesman was taking her for a ride.