A password to a certain database consists of digits that cannot be repeated. If the password is known to consist of at least 8 digits and it takes 12 seconds to try one combination, what is the amount of time, in minutes, necessary to guarantee access to database?

GMAT QUANT Difficulty: 700-Level, Combinations in Problem Solving (PS)
A password to a certain database consists of digits that cannot be repeated. If the password is known to consist of at least 8 digits and it takes 12 seconds to try one combination, what is the amount of time, in minutes, necessary to guarantee access to database?

A. 8!/5
B. 8!/2
C. 8!
D. 10!/2
E. 5/2.10!