AP vs IB senior year

I heard that most colleges only accept one english credit so should I take ap lit senior year or ib English…Ib english is a 2 year course at our school and i have done one year already. Is it worth it two complete the certificate or should I just do AP lit because colleges will only accept one english anyway? Also, are IB credits accepted by the UC’s or u.s universities. I am currently a junior btw. thx guys!!!

For UC policies on AP and IB credits, see:
http://admission.universityofcalifornia.edu/counselors/exam-credit/ap-credits/index.html
http://admission.universityofcalifornia.edu/counselors/exam-credit/ib-credits/index.html