What does it mean that a hypothesis must be ‘falsifiable’ in order to be valid? A. It must have the ability to be proven wrong by some test.
B. It must conform to experimental standards.
C. It cannot be wrong, or the experiment would be pointless.
D. It must be wrong the first time, or you did not learn anything.

bru what tyep of qus is dis

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.