Regarding TA LIST, which of the following description are correct? (Multiple Choice)

Regarding TA LIST, which of the following description are correct? (Multiple Choice)
A . TA List cannot cross the MME and S-GW service range currently selected by the UE
B . The maximum number of TAs that can be included in the TA List allocated by the MME to the UE, that is, the maximum number of terminals that can store is 16
C . When the UE moves within the TA List, it is not allowed to initiate the TAU process
D . When making a call to an idle UE, you can page all TAs in a TA list, or you can page in some TAs in the TA list according to certain optimization algorithms

Answer: ABD