Which comparison is correct and logical
a. the moon is the most brilliant object in the sky
b. the moon is the briliant object in the sky.
c. the moon is the more brilliant object in the sky

Answer A: the moon is the most brilliant object in the sky.

 Sentence A uses correctly the most before the adjective brilliant to make this degree of comparison, the superlative. Brilliant has three sylllables, but if it was a short adjective, the superlative would need the +est instead of most. Examples: tall - the tallest; dark - the darkest etc.  In B, there is no comparison. In C the correct use for more is to compare two things/persons. Mary is more beautiful than her sister.

i cannot see any of the options                                                          

in the door-way, with his head in the room and with a lantern in hand with the most slight ray of light shining from it; so small and opening it so slowly to not disturb the old mans sleep.

i have watched the play of this story last friday.