The correct answer is: B. in
The word “in” is used to indicate a location or position within a place or area. In this case, the speaker is saying that unemployment is widespread throughout the country. Therefore, the word “in” is the most appropriate choice.
The other options are not as accurate. The word “around” can be used to indicate a general area or location, but it does not necessarily mean that something is present everywhere within that area. The word “about” can be used to indicate a topic or subject, but it does not necessarily mean that something is present everywhere within that topic or subject. The word “over” can be used to indicate a distance or amount, but it does not necessarily mean that something is present everywhere within that distance or amount.
Therefore, the word “in” is the most appropriate choice to indicate that unemployment is widespread throughout the country.