help nesting OR statement into COUNTIFS statement

I have 5 total criteria for a COUNTIFS statement, but the first 3 criteria are true regardless:

Formula:

=COUNTIFS(RangeA,CriteriaA,RangeFromDate,">="&$B$2,RangeToDate,"<="&$B$3)

Next I need an OR statement that will return my count if, for example, RangeB with criteriaB is true - OR - if RangeC with CriteriaC either one is true.

Of course, if my data meets both Range/Criteria B and C, then it will only count once, right?

Any help is greatly appreciated, as always!

-HeyInKy