Select the best answer for the question. 3. A combination is an option trading strategy that uses O A. both writing and buying call options. O B.both put and call options. O C. two or more call options. O D. two onore put options. Mark for review (Will be highlighted on the review page) De tre test answer for the question 4. Which of the following statemgyts defines a European-style option? O A. An option that's out-of-the-money O B. An option that can be exercised at any time O C. An option that can only be exercised at expiration O D. An option that's in-the-money