From the CBP website
Customs Brokers License Exam Information
The bi-annual Customs broker license exam (CBLE) was administered on October 8, 2020 resulting in a 37% pass rate prior to appeal decisions. The electronic exam was held nationwide at over 120 testing locations.
This is a much higher pass rate than for previous exams.
Here is one of the questions from the Entry section of the exam. Answer below.
17. The importation to the United States of cats, dogs, and monkeys are subject to Foreign Quarantine Regulations of which agency(s) ________?
A. United States Fish and Wildlife Service
B. Custom and Border Protection Agriculture
C. United States Public Health Service
D. Animal Plant Health Inspection Service
E. All of the Above