Counties are generally made up of
a. one or more cities and the surrounding rural areas.
b. only one city and the surrounding rural areas.
c. the rural areas surrounding a city.
d. the areas within a city border.

Counties are generally made up of

a. one or more cities and the surrounding rural areas.
b. only one city and the surrounding rural areas.
c. the rural areas surrounding a city.
d. the areas within a city border.

Countries are generally made up of one or more cities and the surrounding rural areas. The answer is letter A.

(A) One or more cities and the surrounding rural areas.

Explanation:

The counties are made up of one and more than one cities together and the surrounding part of the rural area. The county is the geographical part of the region in country that are used for the administrative and many other purposes.

It is basically defined as the political subdivision of the states which basically consist of the geographical regions within the boundaries. Therefore,Option (A) is correct.