Need C & D

D Question 15 8 pts a). If the SERIES an is convergent, then > an | is also convergent. [ Select ] n=1 n=1 b). If the SERIES an is convergent, then lim an = 0 [Select ] 72 00 n= 1 c). If f is continuous, positive, and decreasing on interval [1, oo). If an - f(n) and / f(x) da - L, then 00 an = L [ Select ] d). If the SERIES an is convergent, then If the SERIES Van is convergent. n=1 [ Select ]