If says directly as use monthly CF distributions upon instruction or indirectly as somewhere in case is stated the facts which show monthly distributions, then you should use monthly CF streams. Don’t forget to annualize this at the end of calculation.

I don’t agree. Show always calculations and there is significant chance to earn partial credit event the total output is incorrect.

There is no penalty (negative) points and the worst outcome for you is left with zero points. Showing calculations reduces the probability of zero points, does not increase this probability.