Which statement describes an example of gerrymandering

The option that best describes gerrymandering is Option C.  Districts are drawn to make sure that they favor candidates from one political party.

Explanation:  

The term gerrymandering is named after Elbridge Gerry, who signed a bill creating a partisan district so he could win as the Governor of Massachusetts in 1812. It is alleged that lawmakers use their power sometimes to redraw district lines against what are called "majority-minority districts." In elections, such districts where the minority is in the majority can affect election outcomes as minority group voters like African Americans or Hispanic Americans vote against the more conventional, status quo candidates and incumbents.

c. troops marched forward in close formation against newer, more accurate weapons

missouri compromise of 1820 which prohibited slavery