The sentence which uses correct punctuation is C. In time, of course, all issues get resolved, but not necessarily in the way you would like.
In A, the comma before <em>he was concerned </em>should be a dash. In B, there should be a colon before <em>a flashlight, </em>not a semi colon. In D, there should be a comma before <em>yet, </em>and not a colon.
Answer:
Growing up can be difficult.
Explanation:
answer: full time
Explanation: because this kind of employment is 30-40 hours per week
The answer is B. because solar panels produced in chine is 15 percent less that those in america and solar energy price is going own so does the price for installation