What are you studying?
It's not the end of the world if you don't get A's and B's - a C, D and E are still all passes and not too bad for a first attempt! I can understand they're a bit dissapointing after you've work hard, but they could have been worse. Like you said, you can retake your As's and improve your grade if you want. It'll probably be a good idea to be honest because you'll know the exam format and what to expect, thus knowing what to prepare for and improve your grade. So, yes, go for the resits and push yourself harder if you want to improve your grade. Um, yeah, that's it. ^_^' It's possible to improve grades, just needs you to put the work in. ^_^