The answer is D. The country will fall apart without it.
<span>"Lor, only think," said Mrs. Mann, running out,—for the three boys had been removed by this time,—"only think of that! That I should have forgotten that the gate was bolted on the inside, on account of them dear children! Walk in sir; walk in, pray, Mr. Bumble, do, sir. " This is satirical in the sense that Mrs, Mann called to Mr Bumble to come in, but the gate was locked. In a way that we as readers could assume that Mrs. Mann wasn't keen in letting Mr. Bumble in. and she curtsied when she opened the gate.</span>
D. Both are tools for linking pieces of information at different online locations.