Consider the following scala definitions

class Logger[T] { def log (x : T) : Unit = { println (x) } } Recall that: A<:B means "A is a subtype of B"

We would say that Logget [T] is covariant in its type parameter T if Logger[Y]<:Logger[X] whenever Y<:X for any types X and Y

Which one of the following statements is true?

1) Logger[T] cannot be covariant in its type parameter T 2) Logger[T] can be covariant in its type parameter T 3) Logger[List[Int]] <: Logger[Array[Int]] 4) The code fails to compile because the log method does not store x 5) Logger[Array[Int]] <: Logger[List[Int]]