Through e-government,

a. any government unit, business or individual can interact with the government
b. only businesses can interact with the government
c. only individual citizens can interact with the government
d. only government agencies can interact with one another

a. any government unit, business or individual can interact with the government

Explanation:

E-government is a concept that means that the government has electronic presence or provides services electronically through its certain branches and public offices. This is done through technological communications methods which can be accessed to retrieve information by internet. These communication moods are based on the idea of accessing information in regards to different process. An example of e-government can be online visa application systems or online passport renewal facilities.

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.