Albert, Berry, and Collins formed ABC Partnership in the current year. Collins, a limited partner, contributed $20,000 in cash to the partnership and also pledged $10,000 of personal property as collateral to meet any partnership debts that may arise. Collins’s share of the current ABC Partnership loss is $50,000. How much of the loss is deductible by Collins under the at-risk rules?

a. $0

b. $10,000

c. $20,000

d. $30,000