In an Appeal, Some Minor Legal Errors Were Made That

In an appeal, some minor legal errors were made that were unlikely to have affected the overall outcome of the case. This is called what, and what usually happens?

A) Harmless error and do not result in the reversal of a conviction
B) Prejudicial error and do not result in the reversal of a conviction
C) Reversible error and do result in an overturn of conviction
D) All of the above