Problem Solving (PS) | Re: Several teams competed in a mathematical Olympiad. Each team sent thre

Several teams competed in a mathematical Olympiad. Each team sent three participants. Alex, Bob, and Cathy were the three members of the team from NY. Alex got the score equal to the median score of all the participants, Bob received lower score than Alex and was ranked at 19th position among all the participants, and Cathy was ranked at 28th position among all the participants. How many teams took part in the Olympiad if no two participants got the same score?

A. 6
B. 9
C. 10
D. 11
E. 13