Delta Company purchased a delivery truck for a total cost of $15,000. Delta paid $2,000 in cash and signed a note payable for the remainder. The total effect of this transaction on the accounting equation was to:

a.	increase assets by $15,000, increase liabilities by $13,000, and increase equity by $2,000.
b.	increase assets by $15,000, increase liabilities by $15,000, and have no effect on equity.
c.	increase assets by $13,000, increase liabilities by $15,000 and decrease equity by $2,000.
d.	increase assets by $13,000, increase liabilities by $13,000 and have no effect on equity.