Refer to the following series and answer the question (all numbers are single digit numbers only).
(Left) 6 2 1 3 7 6 9 7 4 3 5 2 3 4 3 4 2 3 1 5 7 9 5 8 5 7 5 (Right)
How many such even digits are there each of which is immediately preceded by an even digit and also immediately followed by an odd digit?
A1
B2
C3
D0