单选题：根据下面内容，回答题：Companies that employ illegal immigrants are to

根据下面内容，回答题：
Companies that employ illegal immigrants are to be named and shamed in a further attempt to crack down on people smuggling.The move by the Home Office comes four months after officials launched a concerted effort to identify and prosecute companies breaking the law.More than 200 companies have already been fined for hiring illegal labor. The Home Office says names of companies and directors are to be published on the UK Border Agency website. The agency will publish how many illegal immigrants the company was employing and how much it was fined.
By May this year there had been 137 prosecutions under the new rules leading to fines totaling500,000--almost 3,000 per firm.The total number of prosecutions was 10 times more than were carried out in 2007, and double the total for the previous decade.
Immigration chiefs are also switching their focus from small-time illegal employers,such as takeaway restaurants, in an effort to major organized criminal enterprises supplying illegal labor, often relying on international networks to smuggle people into the UK.
Some 7,500 immigration officers will be re-organized into more localized teams with police and customs officials in an effort to better target what the Home Office says are illegal working hotspots.
These could include areas of the economy where there is a high demand for labor including agriculture,construction and hospitality.Nobody knows how many people are working without permission in theUK--although estimates put the number of illegal residents at more than 500,000.
Trade Union leaders have also raised concerns about the government's strategy, arguing that it could drive the worst employers further underground, penalizing exceptionally poor workers unable to break out of a situation they did not necessarily choose.

What has happened in the first four months of the campaign to crack down on companies hiring illegal workers? A．Nothing. The campaign is still in its beginning stage.
B．7,500 immigration officers will be re-organized into more localized teams.
C．200 companies have been fined.
D．3,000 small-time illegal employers have been cracked down.