Answer:
The credit card is the most effective method of payment.
Step-by-step explanation:
The store will not ship the item until the payment is accredited to their account. Because of this, Jill needs to pick the payment method that have the fastest clear time.
The Check: usually takes about two business days for a deposited check to clear.
Money Order: It depends on the bank. Some banks allow for money orders to be cleared and deposited almost immediately, and some require at least one business day for it to clear.
Credit Card: almost all the time payments can take place immediately.
The obvious choice is Credit Card payment for the instant clear of the funds in the store account.