How many major details are in this paragraph?

A、A. Two
B、B. Three
C、C. Four
D、D. Five
  How many major details are in this paragraph? A、A. Two B - Part One:Ten Steps to Improving College Reading Skills - 英语阅读(1)(第五次开课) - 重庆高校在线开放课程平台 | 大学网课搜题引擎