[单选题]
The average life of any, bdz(u *-0wifwf1krw )ihg6 animal is 70 years.ll 2e9u*r1h q ydw(l4c Assume one numerical figure, write this in powerw(e14yu9lr dh*lc2lq of ten in seconds.
A. $3 \times 10^{7} \; s$
B. $2 \times 10^{7} \; s$
C. $2 \times 10^{9} \; s$
D. $3 \times 10^{9} \; s$
