Greenville Industries Uses the Accrual Basis to Account for All

Greenville Industries uses the accrual basis to account for all sales transactions. Sales for 2018 total $600,000. Included in this amount is $20,000 in receivables from sales on installment. Installment sales are considered revenue for book purposes, but not for tax purposes. Operating expenses total $200,000 and are treated the same for book and tax purposes. Assuming a 35% tax rate, what is the amount of Greenville's deferred tax asset or liability?

A) $7,000 deferred tax asset
B) $7,000 deferred tax liability
C) $4,000 deferred tax asset
D) $4,000 deferred tax liability