Answer:
The correct answer is D): Haley just had a baby; she had a boy.
Step-by-step 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.