None of these is an appropriate way to address academic concerns.
Hard to answer without knowing what your actual GPA and academic situation is, because it looks like you applied to schools like Harvard and Hopkins, etc. It may be that your school list was just top-heavy for your stats. If on the other hand your GPA truly is low, then nothing you write will convince a school that you can handle the academic rigor of medical education--you're going to need to put in the hard work to SHOW that you have reinvented yourself through a post-bacc or an SMP.
Bottom line, you are competing against many other highly qualified applicants. Your stats are your stats, and regardless of why you got that GPA you need to act accordingly. There simply is no reason for a school to take your word for it that you are better than your GPA.