Should parents be forced to take parenting classes?

In my opinion, I think parents should learn a thing or two about parenting. You can say that some parents aren't eligible to parent. 3 in 10 teen girls will get pregnant at least once before age 20. That's nearly 750,000 teen pregnancies every year. Being a parent at a young age provides serious attention. Parents probably should take parenting classes after all.

the correct answer would b,   to show that she was very influential in the democratic party.

not sure maybe the subject closer to it or subject-verb agreement