where are collar ties installed when they are needed to brace rafters? on every rafter on every other rafter…

where are collar ties installed when they are needed to brace rafters? on every rafter on every other rafter on every third rafter on every fourth rafter
Answer
Brief Explanations:
Collar - ties are typically installed on every other rafter when needed to brace rafters. This helps distribute the load and prevent rafter spread in a balanced way.
Answer:
B. on every other rafter