[my experiment proved beyond a doubt that vitamin c can reduce the severity of colds, because i controlled the experiment carefully for every possible confounding variable. choose the correct answer below. a. the statement does not make sense because it is not always easy to discover confounding variables. b. the statement makes sense because every possible confounding variable can be eliminated through careful study. c. the statement makes sense because confounding variables are the only reason an experiment's results could be doubted. d. the statement does not make sense because confounding variables would not affect the reliability of the experiment.

B) The statement makes sense because every possible confounding variable can be eliminated through careful study. 

Explanation:

A confounding variable is one that can affect the dependent and independent variables, therefore it can deeply influence the results of an experiment, however, it is possible to carefully study this kind of variables to get a precise result. Therefore correct answer is B.)

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

the anwser is d) 75°

step-by-step explanation: