Stevie Inc. has $1,380,000 of outstanding accounts receivable on its books. On September 12, Stevie assigned a $30,000 account receivable due from 11 Oaks Mall, one of Stevie's customers, to Novi Bank and Trust ("NBT") for value. On September 30, 11 Oaks Mall paid Stevie the $30,000. On November 15, NBT notified 11 Oaks Mall of the September 12 assignment from Stevie to NBT. NBT is entitled to collect $30,000 from a. either Stevie or 11 Oaks. b. neither Stevie nor 11 Oaks. c. 11 Oaks only. d. Stevie only