When determining the frequency of contractions, you should time the contractions from the:
a. start of one to the end of the next.
b. end of one to the end of the next.
c. start of one to the start of the next.
d. end of one to the start of the next.

Isabel wants to sign up with the online social network teenbook, which she heard about from her friends at school.the teenbook site asked isabel for some personal information to complete her registration.in addition to her full name, teenbook asked for the name of her school, the city where she lives, her age, and her favorite foods.what is the only information that isabel should give to best ensure her safety?