Question: How often should the sender include Load Control Information (LCI) towards a peer in GTP-C messages?
Option 1: Only when the new/changed value has already been provided to that peer.
Option 2: The sender may include LCI periodically, i.e., include the information during a first period then cease to do so during a second period.
Option 3: In every GTP-C message towards the peer, without any exceptions.
Option 4: Only in a subset of the applicable GTP-C messages, as decided by the sender.
Explanation: The correct answer is Option 2 because the paragraph states that "the sender may include Load Control Information periodically, i.e., include the information during a first period then cease to do so during a second period." This indicates that periodic inclusion of LCI is one of the possible approaches that the sender can take.