which of these sentences is grammatically correct?\nbenjamin banneker was an african american scientist and…

which of these sentences is grammatically correct?\nbenjamin banneker was an african american scientist and inventor who helped create the plans for washington, dc.\nan african american scientist and inventor, benjamin banneker, who helped create the plans for washington, dc.\nbenjamin banneker who helped create the plans for washington, dc, an african american scientist and inventor.

which of these sentences is grammatically correct?\nbenjamin banneker was an african american scientist and inventor who helped create the plans for washington, dc.\nan african american scientist and inventor, benjamin banneker, who helped create the plans for washington, dc.\nbenjamin banneker who helped create the plans for washington, dc, an african american scientist and inventor.

Answer

Brief Explanations:

The first sentence is a complete and grammatically - correct independent clause. The second sentence has a non - essential appositive "An African American scientist and inventor" but the main clause "Benjamin Banneker, who helped create the plans for Washington, DC" is not a complete sentence as it has a relative pronoun 'who' making it a dependent clause. The third sentence has a jumbled structure where the appositive "an African American scientist and inventor" is placed in an incorrect position and the sentence is not grammatically correct.

Answer:

Benjamin Banneker was an African American scientist and inventor who helped create the plans for Washington, DC.