Question: In SMS and Internet Electronic Mail interworking, how can concatenation of emails be achieved when transporting via SMS?
Option 1: Only through TP-PID value settings for Internet electronic mail
Option 2: Exclusively by using text-based means described in the interworking procedures
Option 3: Either by the TPUDH mechanism (at a lower level) or by using text-based means
Option 4: Not possible; concatenation is not supported for email transport via SMS
Explanation: Concatenation can be achieved through two methods: (1) the TPUDH mechanism, operating at a lower level, and (2) text-based means, supporting efficient transport of emails via SMS for both single and concatenated messages.