Through the actions of alleles
The correct answer is "southerners." Sarah and Angelina Grimké's parents were slaveholders; while Sarah and Angelina never experienced slavery themselves, they viewed it firsthand, and from their own experience decided to advocate against slavery. This decision carried so much weight because overall, southerners didn't want to give up slavery.
By using the equation F=ma (Force = Mass*acceleration), the answer is 15,100 N for the first one and 1.25 m/s^2 for the second.
