There are 30 students in a class. Choose the statement that best explains why at least two students have last names that begin with the same letter. O The pigeonhole principle shows that in any class of 30 students there must be exactly two students that have last names that begin with the same letter since there are only 26 letters in the alphabet. O The pigeonhole principle shows that in any class of 30 students there must be at least two students that have last names that begin with the same letter since O The pigeonhole principle shows that in any class of 30 students there must be at least two students that have last names that begin with the same letter since O The pigeonhole principle shows that in any class of 30 students there must be at least two students that have last names that begin with the same letter since there are more than 2 letters in the alphabet. there are only 26 letters in the alphabet. there are more than 2 students in the class