At a certain point and a certain time the electric field of an electromagnetic wave is in the negative $z$ direction and the magnetic field is in the positive $y$ direction. Which of the following statements is true?

Energy is being transported in the positive $x$ direction but half a cycle later, when the electric field is in the opposite direction, it will be transported in the negative $x$ direction.

Energy is being transported in the positive $x$ direction and half a cycle later, when the electric field is in the opposite direction, it will still be transported in the positive $x$ direction.

Energy is being transported in the negative $x$ direction but half a cycle later, when the electric field is in the opposite direction, it will be transported in the positive $x$ direction.

Energy is being transported in the negative $x$ direction and half a cycle later, when the electric field is in the opposite direction, it will still be transported in the negative $x$ direction.

None of the above is true.