If you use the trailer hand valve while driving,
a) You might make the trailer skid
b) If might cause the vehicle to start moving too quickly
c) You might scare someone by causing a noise
d) All of the above could happen
Answer: a) You might make the trailer skid
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.