Which one of the following sentences is correctly punctuated? A. She named him Sterling that was her grandfather's name. B. Sterling looks just like his sister Susan, they both have brown hair and small noses. C. Sterling is almost three weeks old, he can already lift his head. D. Haley just had a baby; she had a boy.

The correct answer is D) : Haley just had a baby; she had a boy.

Explanation:

The correct answer is option D because it has a semicolon which is the right punctuation mark for joining two statements ("Haley just had a baby, and "she had a boy") to produce a correctly punctuated sentence.

In order for options A, B, and C to become correctly punctuated sentences, a semicolon would have to be included between the two statements that are in each of the three sentences, thus:

A. She named him Sterling; that was her grandfather's name.

B. Sterling looks just like his sister Susan; they both have brown hair and small noses.

C. Sterling is almost three weeks old; he can already lift his head.

D is correctly punctuated.

Explanation:

D includes a period (declarative) which in here, makes it perfectly punctuated considering that it is a statement. D stated that Haley had a baby, whose gender is a Male.