Your correct answer should be B by the way im looking and analyzing it.
The literary device could be a simile or a metaphor. Does the comparison use the words like or as? If so, it's a simile. If not, it's a metaphor. I'm pretty sure the answer you are looking for is either similie or metaphor.
It will conqustion to have the same equations
What I think is C. predicate adjective.
Because complicated is used as an adjective in that sentence.
Can't be A because nominative is mostly used for subject.
Can't be B because complicated is adjective and not noun.
Don't know the last one though, but I'm sure that it's not the answer.
Here's what I've learned so far. Don't try to study in your bed because you will fall asleep/get too comfortable to work/etc especially if it's at night. Use a table, desk, or the floor. The floor gives you lots of room to put all your work out and isn't comfortable enough to fall asleep on. Normally. Set a time where you don't get on your phone, tablet, whatever. That's a big reason why most people can't focus. When I keep getting distracted by noises, I listen to jazz music. That's because I don't know the words so I can't sing along, it isn't something that's going to make me dance, and doesn't put me to sleep like classical music. Lastly, think in terms of points. Think about how every 0 will affect your grade and whether or not your grade is okay enough for that 0. Well, hope this helps :)