True or false is the answers for each (select) box

a). If the SERIES an is convergent, then an | is also convergent. [ Select ] Select ] iM& iM& False b). If the SERIES an is convergent, then lim an = 0 [ Select ] True 71 -400 c). If f is continuous, positive, and decreasing on interval [1, co). If an = f(n) and / f(x) dx = L, then DO an = [ [ Select ] n=1 DO d). If the SERIES an is convergent, then If the SERIES van is convergent. n =1 R=1 [ Select ]