Which One of the Following Variables Influences the Value of Call

Multiple Choice

Which one of the following variables influences the value of call options?I) Level of interest ratesII) Time to expiration of the optionIII) Dividend yield of underlying stockIV) Stock price volatility

A) I and IV only
B) II and III only
C) I, II, and IV only
D) I, II, III, and IV
E) I, II, and III only