Zane owns a portfolio worth $28,000 that consists of 2 stocks: North coast coasters, which has a beta of 1.60, and Bronwyn Bank, which has a beta of 0.70. How much is his Bronwyn Bank stock worth if his portfolio has a beta of 0.90?
A. An amount less than $6,000 or an amount that is equal to or greater than $22,000
B. An amount equal to or greater than $6,000 but less than $10,000
C. An amount equal to or greater than $10,000 but less than $14,000
D. An amount equal to or greater than $14,000 but less than $18,000
E. An amount equal to or greater than $18,000 but less than $22,000