Someone who can vouch for your skills experience and work habits is called a

It is called a reference.

Example:

When applying for a work, the employer will look at your reference to see if you are qualified for the job or not.

Another definition for reference is that it is a use of a source of information in order to ascertain something

answer; (d) none of the above;

hey,

i hope you are having a wonderful day

the correct answer is :

{b.}   ( american workers lose job opportunities )

hope this : )

    -sprinkles