So when one scientist turns around and says the mass of an electron is 9.10938291×10^-31 kilograms we know what a kilogram is and so we don't get an answer that it's 32949 microsmiths as he invented his own measurement because he needed one.
An experiment or observation designed to minimize the effects of variables
Answer: The answer I would go with C. It is a well - tested explanation
Explanation:
Because....
It could be the first one as well, but I believe this is a better choice because the paragraph shows the person is testing on child development but it also gives a valid explanation, which is the reason why I say the answer is C.
* Hopefully this helps:) Mark me the brainliest:)!!
<em>~234483279c20~</em>
