Read the following statement in a Java program that compiles and executes- submarine.dive (depth); What can you say for sure?

Read the following statement in a Java program that compiles and executes- submarine.dive (depth); What can you say for sure?

1. a) depth must be an int
2. b) dive must be the name of an instance field
3. c) dive must be a method
4. d) submarine must be the name of a class