Which statements are true about the Multiple Operations variation?
(A) Any operation cube in Required or Permitted may be used many times in any Solution.
(B) After a Now challenge, a + in Resources may be used multiple times in any Solution.
(C) An Equation-writer must indicate in a special way that an operation cube is used many times.
(D) If Factorial is also in effect, players are still limited to two factorials in their Solutions