I agree with Henri, I see a difference.

You cannot go there. - It is not possible/permissible to go there, i.e. you have to not go there.
You can not go there. - it is not obligatory to go there, i.e. you don't have to go there.

But I can see how it could be confusing and I'd avoid "can not".

p.s. I'm UK

In a French omelette you should only use 1 egg.

...because in French, 1 egg is un oeuf.

Isn't writing a little like a balanced diet? - everything in moderation.
If you use an adverb where an adverb is needed then it's ok... but if you overuse adverbs, or repeat the same tiresome cliche-ed adverbs, etc. then your writing is going to suffer.

Jasper, I would also have said that 'A' was the most natural in English.
Choice 'D' seems quite clumsy to me.

The UK Guardian newspaper style guide also uses Farc and Nasa.

They say this:
Use all capitals if an abbreviation is pronounced as the individual letters (an initialism): BBC, CEO, US, VAT, etc; if it is an acronym (pronounced as a word) spell out with initial capital, eg Nasa, Nato, Unicef, unless it can be considered to have entered the language as an everyday word, such as awol, laser and, more recently, asbo, pin number and sim card. Note that pdf and plc are lowercase.

I'm very content to use Table of Contents.

Typo alert... - "1 power OF attorney...."

Monocle (et al.) - do we really need to add extra irregular verbs to the language when the perfectly regular 'texted' is already in common use and understandable?

To counter your list, how about - vet / vetted - pet / petted - arrest / arrested - reflect / reflected... why not text / texted...?

provincejim - "Stoke have confirmed the signing of Michael Owen on a one-year-deal...." sounds fine to my British ear.
"Stoke has confirmed..." would sound wrong, on the other hand, more like a person or the town of Stoke that did something, not the football team (sorry, soccer team ;) ).

I guess in the US, teams are maybe more often called by their nicknames, "The Rams have played ..." etc., but if you look on various forums and boards, there are lots of US examples of, "Dallas have drafted...." or "Chicago have drafted..." etc., so it's not just a British thing.... but maybe is a sports thing.

bringing it back to attorneys rather than military ranks... it is 1 power or attorney, and 2 powers of attorney (not 2 power of attorneys)

same principle.