What Is the Legal Effect of a Testator Executing a Second

What is the legal effect of a testator executing a second will,when the testator already has an earlier existing valid will?

A) The second will is invalid, unless the first will has been expressly revoked.
B) The second will automatically revokes the first will.
C) The presence of two wills invalidates both of them until one is revoked.
D) The probate court will determine which of the two wills more accurately represents the desires of the decedent.
E) The two wills are read together to the fullest extent possible, but where the wills are inconsistent, the second will controls.