Do the following events decrease, increase, or have no effect on a firm$$s current ratio?

A$)$ Inventory is purchased with cash on hand.

B$)$ Company XYZ takes out a $5-$year loan, with the money being used to pay suppliers.

C$)$ A customer pays a past due bill $($the bill was not written off yet$).$

D$)$ Company XYZ establishes a line of credit with Bank ABC, which will allow it to borrow money in the future.

E$)$ The company sells a $10-$year old machine, receiving cash from the sale.