*I shall award brainliest to the first correct answer AND the correct answer to my riddle :D* Who invented vaccination?

Charles Darwin
Edward Jenner
Issac Newton
Robert Hooke

*Riddle Time!*

A is the brother of B. B is the brother of C. C is the father of D. So how is D related to A?

it would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

i wish you would have provided choices to simplify it and allow me to give an exact answer.

check for the pregnancy rating of drug. if its class c or d see if other alternatives

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.