answer: d. that

#KeepOnLearning

D.That

What is asubordinating Conjunction ?

• A subordinating conjunction is simply the word/words that is used to join a subordinating clause to another clause or sentence.

• Here are some common subordinating conjunctions: after, although, as, because, before, how, if, once, since, than, that, though, till, until, when, where, whether, while.

hope it helps

Have a nice day!