Crack cocain I believe
Nah I'm kidding
Perseverance, pulling through, showing up and not backing down. It provides the idea of not giving and being there no matter what, typically the person isn’t someone to back down or give up.
The only word out of these four which has an obvious negative connotation is C) harangue. That word means <em>to lecture somebody in an aggressive manner</em>, which is negative.
The other words have neutral connotation.