According to the Author,why Do Street-Level Bureaucrats Pose a Challenge

According to the author,why do street-level bureaucrats pose a challenge regarding secondary data analysis?

A) They make decisions and record the bases for their decisions without much supervision.
B) They control the "purse strings" for grant making for secondary data analysis.
C) They have a broad range of training and experience.
D) They are part of a hierarchical organization.