Thanks Joseph, I did miss that "multi select" option and it did make a difference in the way the multichoice question works.
However, I noticed that after submitting your choice, the response is wrong. On all other question types, the response page reads "Your Answer:" then it prints the content of your answer along with the response line the teacher has entered.
On the Multichoice question type, the "Your Answer:" response is blank as indicated in this screne shot. In this instance it should have printed "four" above the word "YES". That missing answer caused me to think there was a logic error in the code.
Clarence