MECHANICS (errors in the use of apostrophes)
the answer is a.
A.At one time, "yes, ma'am" and "no, sir" were some boys' and girls' respectful responses to adults' questions.
B.Safeguarding the environment is not somebody elses responsibility; it is our's.
C.The Servicemen's Readjustment Act of 1944 is better known as the GI Bill of Rights.
D.Electrocardiograms (EKGs) are used to diagnose heart disease.
I disagree.
its b.
The correct answer is D.
To determine the errors in the use of apostrophes, let's analyze each option:
A. "yes, ma'am" and "no, sir" were some boys' and girls' respectful responses to adults' questions.
This sentence is correct. The use of the apostrophes in "boys'" and "girls'" shows possession, indicating that the responses belong to the boys and girls.
B. Safeguarding the environment is not somebody else's responsibility; it is our's.
In this sentence, the incorrect use of an apostrophe is in "our's." The correct form should be "ours," without the apostrophe. The word "ours" indicates possession, so there is no need for an apostrophe in this context.
C. The Servicemen's Readjustment Act of 1944 is better known as the GI Bill of Rights.
This sentence is correct. The use of the apostrophe in "Servicemen's" indicates that the act belongs to the servicemen.
D. Electrocardiograms (EKGs) are used to diagnose heart disease.
This sentence is correct. There are no errors in the use of apostrophes.
So, the only sentence with an error in the use of apostrophes is B. Safeguarding the environment is not somebody else's responsibility; it is ours.