I think I might actually go for B, but it would depend on the circumstances. What instrument is this for? What in this context is implied by the tenuto articulation? The tempo, the general character of the music, the rhythmic patterns elsewhere &c &c &c might all influence the choice.
Thank you so much for the replies! They were helpful! Sorry about not giving a context to the question... It was for sax. The tempo is slow. Also the tenuto is intended to indicate a note that is soft-tongued. I am thinking I'll go with example A. I have another very tricky beaming question but I'll post it tomorrow Thank you again!
HP