Testimony given under oath at a trial is called a deposition dissembling avidly beguile

Answer is A) Deposition

Deposition is testimony given under oath. It is part of the fact-collection process that takes place outside of trial, generally before the trial begins. It is a more private format, and does not take place in a courtroom. Usually it consists of a series of questions and answers, the questions posed by an attorney and the answers provided by the sworn-in witness. 

Music me focus more because it blocks out all the distractions around me, but i guess it depends on who you are