Which of the following are true when using build parameters? Choose 3 answers

Which of the following are true when using build parameters? Choose 3 answers
A . If your Jenkinsfile specifies parameters with the "parameters” directive, those are the only parameters recognized when the Pipeline executes; any parameters that were specified In the "Project is parameterized" section of the Job configuration are cleared.
B . Use the "params" object to reference parameters that are defined on "The project is parameterized" section of the job configuration.
C . Use the "parameters" directive to define parameters for your Pipeline Inside your Pipeline code.
D . If you configure a build parameter of type File, then users can specify a file on the server as build input.

Answer: A, B, C