Question

A scientific theory is proposed after several valid investigations. This makes scientific theories

elaborate descriptions of observations
the most powerful explanation scientists have to offer
unchangeable by other scientists over a period of time
unacceptable to a majority of scientists

Answer 1

the most powerful explanation scientists have to offer

Step-by-step explanation:

just took it and got it right

Answer 2

A scientific theory is proposed after several valid investigations. This makes scientific theories elaborate descriptions of observations. The reason why it is the answer is because it requires time and critical thinking in order to formulate the scientific theories of scientists.