Which of the following can fill in the blank to make the class compile?
package ai; public class Main { compute() { return 10; } }
B.
Option A is incorrect because the public access modifier starts with a lowercase letter.
Options C and D are incorrect because the return types, void and String, are incompatible with the method body that returns an integer value of 10.
Option B is correct and has package-private access.
It uses a return type of Long that the integer value of 10 can be easily assigned to without an explicit cast.