Number three is the answer
The correct answer is D. <span>Collecting is very popular today, it is a good investment and fun.
This is because these two sentences are connected only using a comma. What it needs is a conjunction to avoid being a run-on sentence. The other sentences have either conjunctions or a semi colon which also works.</span>
"Life is wasted if we do not grasp the glory of the cross, cherish it for the treasure that it is, and cleave to it as the highest price of every pleasure and the deepest comfort in every pain. What was once foolishness to us—a crucified God—must become our wisdom and our power and our only boast in this world.” - John Piper
I predict C-personal pronoun sorry if it’s wrong and good luck!!