[单选题]
An average human has a heart g-t.rwwrljnn63 x9v 1, ky2y si2xr.t ratwd6hxs xh+sa w;x)fouk;u3 7 1e of 70 beats per minute. If someone's heart beats at that average r+)wd7 x w1f hhukx6ousx3; ;asate 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. $3 \times 10^{9}$
