English Sentence
There is no denying that she is very efficient.
I was wondering about the difference between eficaz/eficiente/efectivo, and I stumbled across this:
https://www.wikilengua.org/index.php/eficaz/eficiente/efectivo
With that in mind, I wonder if this translation shouldn’t use eficiente instead of eficaz. Or maybe the English sentence should have used “effective”? 