I'm doing Duolingo Spanish. The other day, I had the sentence
We are not doing it
To which I gave the answer
No la hacemos
This was marked wrong, with the correct solution of
No lo hacemos
I admit I'm not real clear on the lo, le, la difference (which Duolingo never explains), even after looking at a couple explanations online.
So, is la incorrect here (and why?), or is Duolingo (for rejecting it; they usually take most reasonable translations)?