So do you just need to write which one is short and which is long?!
Answer:
The answer is B Two Rare And Valuable Pennys
Explanation:
It couldn't have been A because the first penny has nothing to do with stamping
and it couldn't be C because the second penny doesn't have anything to do with WW2
and it couldn't be D because it barely skims the surface of that topic.
Now of course all of those are mentioned, but the one that stands out the most, and is most relevant is B.
So logically the answer is B.
This sentence is C. compound.
Compound sentences consist of at least two independent clauses, and each clause has to have at least one predicate, or verb. Here, there are two independent clauses: My uncle and I built (the treehouse in our back yard) AND (My uncle and I) painted the tree house in our back yard.
A simple sentence has only one verb; a complex sentences has to have a subordinate clause as well as independent one.