public interface Serializable
Serializability of a class is enabled by the class implementing the java.io.Serializable interface. Classes that do not implement this interface will not have any of their state serialized or deserialized. All subtypes of a serializable class are themselves serializable. The serialization interface has no methods or fields and serves only to identify the semantics of being serializable.
https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html
Gabarito: c)