When a Judge Delivers Their Decision

When a judge delivers their decision:

A) they simply state the decision and do not provide any explanation as to how it was reached.
B) they usually do not explain which evidence was accepted and which evidence was rejected.
C) there is rarely any indication as to the legal principles relied upon in reaching the decision.
D) they explain how the decision was reached including the evidence that was accepted and the legal principles that were relied upon.