[单选题]
An average human has a - t(l kdcq tkvpz+/p:8c/1tti heart rate of 70 beats per minute. 4 w b14fucxjt5fu+o:cp+vep (If someone's heart beats at that average rate over a 70-yr li+ ptuo ( c4w1f 5e:j+vbuxcf4pfetime, how many times would it beat?
A. $7 \times 10^5$
B. $2 \times 10^{6}$
C. $2 \times 10^{7}$
D. $3 \times 10^{9}$
