The left ventricle works harder than the right ventricle because it has to .

A.
squeeze carbon dioxide from the blood
B.
send the blood to both lungs
C.
push the blood through the whole body
D.
push the blood back into the heart

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .

what are the options? add them, then i will be glad to .