It should be cover b
The soft contrast between the letters and dress compliment each other well and the letter "A" stands out to read "A Threads Magazine" rather than the other which seems to read "three ads"

Love this! I am headed to a Pirate of Caribbean Halloween Bash this weekend and I am going as Calypso Voodoo Priestest.
Would love to have incorporated the stitches as part of my costume. What a great Phot.