<span>i suppose that would be c. From 10% to 20% of school-aged children develop intense anxiety over some issue, for instance, children with school phobia feel intense apprehension about attending school.</span>
Answer: The sentence that is complete and properly punctuated is <u>D. From 10% to 20% of school-aged children develop intense anxiety over some issue; for instance, children with school phobia feel intense apprehension about attending school.</u>
Explanation: <u>Sentence D</u>. is the only one that is complete and properly punctuated because it <u>expresses a full idea </u>and makes a good use of punctuation marks. Punctuation rules state that, <u>when using "for instance" in a sentence, a semicolon must precede this term and a comma must come after it.</u> In that way, as <u>D. is the only option that includes a semicolon before "for instance" and a comma after it</u>, this sentence can be considered properly punctuated.
