Solved it with divisibility, cycle of 7 is:
7
49
343
2401
Possible Remainders when divided by 8 are either 7 or 1, as 1 is the only answer choice available -> 1
7
49
343
2401
Possible Remainders when divided by 8 are either 7 or 1, as 1 is the only answer choice available -> 1










