[单选题]
An average human has a heart rate of 70 beats +tt4pd6j4 ibbper minutewqg0yw)x0 kpp2x7v v9 . If someone's heart beats at that average ra pgwq9xxvkp7)0yw v02te over a 70-yr lifetime, how many times would it beat?
A. $7 \times 10^5$
B. $2 \times 10^{6}$
C. $2 \times 10^{7}$
D. $3 \times 10^{9}$
