Richard A. Ludwin (born May 27, 1948) is an American television executive and former vice president at NBC Television. He is notable as the executive who backed Jerry Seinfeld's series "Seinfeld", which went on to become one of the most popular and successful television sitcoms of all time. He was also the head of NBC's late night programming during the Conan O'Brien and Jay Leno conflict in 2010.
Conan O'Brian and Jay Leno were good friends
A: No

The Opera Company of Boston was an American opera company located in Boston, Massachusetts, that was active from the late 1950s through the 1980s. The company was founded by American conductor Sarah Caldwell in 1958 under the name Boston Opera Group.
Sarah Caldwell conducted for over thirty years.
A: It's impossible to say

The Four Cs of 21st century learning, also known as the Four Cs or 4 Cs, are four skills that have been identified by the United States-based Partnership for 21st Century Skills (P21) as the most important skills required for 21st century education: critical thinking, communication, collaboration, and creativity.
Comprehension is also an important education skill.
A:
It's impossible to say