英语阅读求解

英语阅读求解
Hello, everyone. My name is Mark Teller, and I’ll be your teacher of this course, Ecology and Environment. To begin with,let’s take a look at the teaching program shown on the screen. As you should all know by now, this course is given on Tuesdays and Fridays from 2:00 to 5:30 in the afternoon. We will be meeting in this room for the first half of the course, but we will be using the research lab every other week on Friday in Room 504 during the last two months of the course.
Now, please look at the blue paper in front of you. It is the text for this lesson. Unfortunately, the textbooks haven’t come in yet, but I was told that they would be available the day after tomorrow. Again as you see on your course outline, the grade is determined by your performance in the mid-term and final exams, classroom tests, and on your research work.
My office hours are from 9:00 to 12:00 on Wednesdays, and you can set up a date with me on other days as well.

Question : How often will the class meet in the research lab?
A. Once a week. B. Twice a week.
C. Once a month. D. Twice a month.