A company has cash $1,400, accounts receivable $2,100, marketable securities $2,000, inventory $1,728, accounts payable $4,700, accrued expenses (unpaid yet) $500, and common stock $1,000. Its quick ratio is: Select one: O a. 1.39:1 O b. 1.44:1 O c. 1.06:1 O d. 1.67:1