The correct answer is c. 1 year old
It's avail, avail means make use of
Friar Laurence suggested Juliet take the potion because it would put her in a deep sleep for a few days and make her appear dead so that she does not have to marry Paris. The Friar said he would send a message to Romeo to let him know she was ok. In the end, Romeo was not there when Juliet woke up from her slumber.