[单选题]
Suppose that the build-up of fatty tissue)kxr :b f;,rre7 oi6+nea5ig b on the wall of an aw 08yme lh tof*84cyq7rtery decreased the radius by 10%. By how much would the pressure provided by the heart have to be increased to maintain a constant blood fl0*yyt8meo chw l f84q7ow?
