Right on all of them
I believe much depends on kind of strategy.
For example if you follow big trend and you keep an position even for few months released news don't affect at all the trades as same of weekend. No need to close positions.
So following big trend doesn't need a time to "not trade"(maybe only on flat market) but backtest can answer even on this matter.
Your post while interesting is copy and paste from an other site. Please don't do that again without posting a reference link.
Also we recommend this kind of content only on Press review topic.