C-07-Q078mediumsingle_mcqFor the sequence with un=1nu_n = \dfrac{1}{n}un=n1, if un>10−8u_n > 10^{-8}un>10−8, the value of nnn satisfies —an<108n < 10^{8}n<108bn>108n > 10^{8}n>108cn=10−8n = 10^{-8}n=10−8dn>10−8n > 10^{-8}n>10−8