Question

informal assessments
use the information below to answer the question.
gathering information about potential careers is an informal assessment. an informal assessment is one in which there are no set expectations. the person who is considering potential careers is conducting the assessment.

one can conduct an informal assessment by observing the careers and fields one is interested in, this is a great starting point. one can and should go in depth by talking to others in the field they are interested in. career days are a great way to be exposed to the various occupations that are available. job shadowing is also very valuable and when possible should be done over an extended period of time.

when should job shadowing be conducted?
over the course of a day
over an extended period of time
only when one cannot get a real job

Explanation:

The provided text about informal assessments states that job shadowing is valuable and "when possible should be done over an extended period of time", which directly answers the question.

Answer:

over an extended period of time