<p>i'm guessing you're a sophomore? at my school, freshman year, one B was the difference between 1st and 55th rank (out of 580 ish). Sophomore year, it was the difference between 1st and 25th or so. Junior year, only about 10 people had straight As. Senior year, that number is down to probably 5. So as more people get "one B", it will matter less and less. As long as you aren't an all-or-nothing student, who decides that as long as one B is okay, all Bs are okay... then gets one C and decides the same thing about Cs... because, trust me, I've seen that happen plenty.</p>