How Has the Rate of Teen Pregnancy Changed in the U.S

How has the rate of teen pregnancy changed in the U.S.?

A) It has been steadily, albeit slowly increasing with historic time.
B) The rate had slowed, but just recently increased again.
C) The rate of teen pregnancy in the U.S. is lower than any other industrialized country.
D) American teens are now less likely to use contraception than at any other time.