Pierre's Antiques is an antique shop featuring early European pieces harmoniously paired with North American native art. He offers many services to his loyal customers, like free delivery for large pieces, free independent appraisals, and design consultations. Most recently,Pierre began accepting Visa and MasterCard in his shop. With all of the attractive services he already offers, why did Pierre add third-party credit cards?

a) to increase its inventory turnover

b) to decrease its accrued liabilities

c) to decrease its liquidity

d) to ease the financial burden of accounts receivable

e) to increase its fixed assets