/etc/services on my CentOS machine goes up to 49000. Reserved ports are less than 1024.
Well known and reserved ports are two different things. Well known ports only need a registration with IANA. Reserved ports, on *nixes, requires root for a deamon to bind to the port.
Answer:
The answer is A or the first option.
Explanation:
Graphical management tools and infrastructure, Server graphical shell
I would go C because that way it gets her prepared to answer any techie questions they would have for her and would make her a better option.
The correct answer would be "C". This is because troubleshooting means searching for troubles in a system or software. B and D wouldn't make sense, but A would work better. The reason A doesn't work is because updating software isn't scanning for viruses and checking for patches.
In conclusion, the answer is C. I hope this helps. Don't worry, you can ask if you need better understanding!