Sentence Correction

The plot of The Bostonian centers on the rivalry between Olive Chancellor, an active feminist, with her charming and cynical cousin. Basil Ransom, when they find themselves drawn to the same radiant young woman whose talent for public speaking has won her an ardent following.

(A) rivalry between Olive Chancellor, an active feminist, with her charming and cynical cousin, Basil Ransom

(B) rivals Olive Chancellor, an active feminist, against her charming and cynical cousin, Basil Ransom

(C) rivalry that develops between Olive Chancellor, an active feminist, and Basil Ransom, her charming and cynical cousin

(D) developing rivalry between Olive Chancellor, an active feminist, with Basil Ransom, her charming and cynical cousin

(E) active feminist. Olive Chancellor, and the rivalry with her charming and cynical cousin Basil Ransom

IMO C

(C) rivalry that develops between Olive Chancellor, an active feminist, and Basil Ransom, her charming and cynical cousin

As between is used, the below falls perfectly into place:

"Olive Chancellor, an active feminist, and Basil Ransom, her charming and cynical cousin"