Which of the Following is Essential for Development of Discrete,isolated

Question

Which of the following is essential for development of discrete,isolated colonies?
A)Broth medium
B)Differential medium
C)Selective medium
D)Solid medium
E)Assay medium

Accepted Answer

Solid medium provides a surface for bacteria to grow on and prevents them from diffusing or mixing with other bacteria, allowing them to form discrete, isolated colonies.