A school must select four students from seven students A, B, C, D, E, F, and G to form a debate team to participate in the city's debate competition. According to the usual training situation, the selection must meet the following conditions:If E participates, then C must also participate; unless B participates, G does not participate; at least one person from A and B participates, but not both; at least one person from E and F participates, but not both.
Based on the above statement, which of the following students will definitely participate in the debate competition?
Only one person in C or D will participate, or both of them will participate.