Rounding, $$398^{}\circ \rm C$$ is closer to $$400^{}\circ \rm C$$ than to $$390^{}\circ \rm C$$. 
Round $$398^{}\circ \rm C$$ to the nearest $$10^{}\circ $$. 
A: $$380^{}\circ \rm C$$ 
B: $$390^{}\circ \rm C$$ 
C: $$399^{}\circ \rm C$$ 
D: $$400^{}\circ \rm C$$ 