}
A . Create a distinct list of route table name objects
B . Create a map of route table names to subnet names
C . Create a map of route table names from a list of subnet names
D . Create a list of route table names eliminating duplicates
Answer: D
Explanation:
route_tables_all is assigned a list of unique route table names filtered from a list of objects describing subnet details, one of those object attributes being route_table_name.