Final answer:
Only one instance of a servlet is created by the servlet container to handle all requests, regardless of the number of users or browsers. Thus, the answer is A. 1.
Step-by-step explanation:
In the context of servlet behavior, it is important to understand the lifecycle managed by the servlet container, such as Apache Tomcat, GlassFish, or others. According to the servlet specifications, only one instance of a servlet is created to handle all requests. This means that multiple users or browser accesses will interface with the same single instance; the servlet container manages concurrent access through multiple threads.
So, irrespective of how many different people (20 in this case) are accessing the servlet, or the number of browsers they are using (10 in this case), only one instance of a servlet is created by the container to handle all these requests. Therefore, the correct answer is A. 1.