Terrence Gallo worked 10 years in Texas, moved to California and worked an additional 5 years for the same company. Terrence retired in California and began receiving a $10,000 annual pension, which is attributable to his services performed in both California and Texas. Terrence is taxed on what amount of his pension on his California income tax return? A. $0 B. $2,500 C. $5,000 D. $10,000