Actually, they have been "selected." They have completed all of the required paperwork and examinations. They are waiting in line to come into the country. We have annual quotas for various classes based on their eligibility under the law. For example, a spouse would have a higher priority than a nephew.
Some wait in line for over a decade. Chain migration should be limited to the nuclear family and then many of these applicants would be disallowed. We take in 1.1 million LEGAL PERMANENT IMMIGRANTS A YEAR, more than the rest of the world combined. These numbers are way too high and should be reduced to 300,000 or less.
Thank you for the clarification.