The help file notes for both the "Option _Explicit" and the "Option _ExplicitArray" that each of these must be the very first statement in the program. However, it seems that both of these statements can be used together with either one being specified first.
It might be good to specify for the help topic on these statements that an exception to the rule is that the other option can precede that statement.
For example, it is OK for "Option _Explicit" to precede "Option _ExplicitArray". Likewise, it is OK for "Option _ExplicitArray" to precede "Option _Explicit".
I know that this is a tiny little nitpick, but I thought that it might be helpful.