If a bond is selling for a discount, what does this indicate has happened to market interest rates since the bond was issued? (Reminder: bond prices and market interest rates are like a seesaw!)

		Market interest rates have decreased which has caused this bond's price to increase
		Market interest rates have decreased which has caused this bond's price to decrease
		Market interest rates have increased which has caused this bond's price to increase
		Market interest rates have increased which has caused this bond's price to decrease