I wish the text on this one stood out a bit more but it looks good.
Submission B: 5/5 - 750K
Stock work is good, but this one is way too blue. On Tomlinson one the Render stands out a bit, here the Render is hidden behind Blue. A good way to fix this is darken the background up a bit, so the Render can be blue. Since it's a USC render I get that you're trying to correct that. Use Adjustment layers like Hue and Clip Mask them to the Render.
Submission C: 4/5 - 600K
The Worst of the Bunch. This one took a lot of reading. Think I read the text 4 times to figure out what it says, again way too green. This one needs some work and when we look at what you can do with #1 and 2 this ones a bit confusing BG work is decent though.
Submission D: 4/5 - 600K