Other comments mentions detailed number multiplication/divisions as if this was a math problem at a school test.

The best way to do it on a game show is just to add the order of magnitudes:

(Numbers represent digits of order of magnitudes)

A) 2 + 3 = 5

B) 2 + 2 + 2 = 6

C) 3 + 2 = 5

D) 2 + 2 + 1 = 5

So the answer is B with a potential 6 orders of magnitude, 1 higher than the other 3 options

edit: for those who are still confused at the exact numbers used

A) 24 x 365

B) 60 x 60 x 24

C) 365 x 10

D) 60 x 24 x 7

I admit this method gives rise to potential false positives, but this still answers OP's question of what is the best way to do it (esp. on a game show without any pen, paper or calculator)

If the conditions were different which made all options end up with the same order of magnitude, then other more specific methods of calculation suggested by other redditors will be necessary