"If we wish to be free-if we mean to preserve", "if we mean not basely to abandon" AND "which we have been so long contending", "which we have been so long engaged", "which we have pledged".
Parallelism is the repetition of the same grammatical structure. There are two instances of parallel structure in this excerpt. The first is the "If we ___ to ___" structure. The second is the "which we have _______" structure. By filling the passage with this parallel structure is gives the sense of a list of reasons that all, compounding on top of one another, logically lead to the need to fight. The change from the parallel structures in the last line "we must fight!" makes this exclamation stand out and hold power.
The flag's banner or ribbons will be blown away in the storm.
so what Iducky22 is pretty much saying is d would be the answer for e2020
