Using proportions, it is found that the correct option is given by:
B Ron should replace the pitcher with a relief pitcher.
A proportion is a fraction of a total amount.
In this problem, when Ron replaced the pitcher, the team won 8 out of 14 games, hence the proportion of wins is:
pR = 8/14 = 0.5714.
When Ron kept the pitcher, the team won 4 out of 10 games, hence the proportion of wins is:
pK = 4/10 = 0.4.
Since pR > pK, option B is correct.
More can be learned about proportions at https://brainly.com/question/24372153