The Sum of 1 $\times$ 10^-2 Km, with the Correct Number of Significant Figures Is

Multiple Choice

The sum of 1.00 m + 1531 mm + 2.54 $\times$ 10^-2 km, with the correct number of significant figures is

A) 0.3 $\times$ 10² m.
B) 27 m.
C) 27.9 m.
D) 27.93 m.
E) 27.931 m.