Old English is the origin
B. Nothing about the Navajo's artistry in jewelry and textiles helped the Allies during WWII, although using their language as a code definitely did.
When Harry opens his blanket, Ginny notices the holes spell something out: “Dad. Help. Godric’s Hollow. 31/10/81.” Harry then realizes that Albus has sent him a message telling where he is in time.
The compound sentence is letter C: She was disappointed, but she accepted second prize with grace.
Sentence structures could be simple (one independent clause), compound (two independent clause with coordinating conjunction), complex (a subordinate & independent clause) and compound-complex sentences (subordinate & two independent clause). These include clauses, conjunctions, coherence and balance and even to the number of words you use in your subject and predicate. The benefit of complex or compound sentences is that it could give you more explanation on the subject or topic of the sentence. This gives you a much more understanding on what the sentence is trying to portray or to message to give.