Final answer:
A bond's price will generally increase if there is an increase in the bond's coupon rate or a decrease in market interest rates, as these factors make the bond more attractive to investors.
Step-by-step explanation:
The student has asked which factors will generally cause the price of a bond to increase, assuming that all other factors remain constant. Among the provided options, an increase in the bond's coupon rate (C) and a decrease in market interest rates are the two factors that will generally lead to an increase in a bond's price. When a bond's coupon rate is higher than the market rate, it becomes more attractive to investors, leading to an increase in its price. Additionally, when market interest rates decrease, existing bonds with higher interest rates become more valuable, and their prices increase. Conversely, an increase in the yield to maturity (YTM) or an increase in the maturity horizon will not generally lead to a bond price increase.