My job has many pieces that stretch my ability every day.This is a(n) ______.

A) challenging task characteristic
B) repetitive task characteristic
C) unclear task characteristic
D) mundane task characteristic

The statement mentions that the job has many pieces that stretch the ability every day, which indicates that the job is challenging. Therefore, option A, challenging task characteristic, is the best choice. The other options do not fit the description given in the statement.