Answer:
The third statement is true.
Step-by-step explanation:
From the first statement, John and Jane are in agreement.
From the second statement, Jane and Sue are in agreement
Because the first two statements are true, they can be joined together to form a statement, the new statement will imply:
John, Jane and Sue are in agreement about the weather.
When this new statement is compared to the last statement which says Sue and John agree about the weather, then it's safe to conclude that the last statement is true.