<p>I highly doubt one bad grade is going to affect your overall (otherwise strong) application.
I know a friend who got into JHU with two C+s (and similar stats to yours)
WUSTL has high standards, and the UCs might be difficult as well just cuz they are in the University of California system.
The one potential problem for your app is your international student status… it’s tougher for internationals to get into any school in the US not to mention the top schools.
But like I said, I doubt one bad grade is going to affect your overall application.
And your SAT scores show a strong showing in math.
In short- Don’t worry too much!</p>