Which allusion best captures the theme of the martin luther king speech

Let's look at a few:
1.) "Five score years ago, a great American, in whose symbolic shadow we stand today, signed the Emancipation Proclamation" 
Dr. King's speech (1963) was made 100 years after Lincoln's Emancipation Proclamation (1863) that freed all slaves in rebel territories. King salutes Lincoln's contribution to the fight against discrimination. He literally and figuratively stands in Lincoln's "shadow," as he is giving the speech in front of the Lincoln monument and he is continuing the fight that Lincoln played such a large role in

2.) "When the architects of our republic wrote the magnificent words of the Constitution and the Declaration of Independence, they were signing a promissory note to which every American was to fall, heir Instead of honoring this sacred obligation, America has given the Negro people a bad check"
King references the document which proclaims that "All men are created equal... with certain unalienable rights." He then proceeds to decry the denial of these rights and this equality by the segregation and racism that the African-American community has faced since the founding of the nation (and still faces today)

I hope this helps! 

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.

b. brooks wrote about the same type of neighborhood in which she grew up.