R1 is internal to area 1, and R2 is internal to area 2. Subnet 10.1.1.0/24 exists in area 2 as a connected subnet off R2. ABR ABR1 connects area 1 to backbone area 0, and ABR2 c onnects area 0 to area 2. Which of the following LSAs must R1 use when calculating R1's best route for 10.1.1.0/24?（）

• A、R2's Type 1 LSA
• B、Subnet 10.1.1.0/24's Type 2 LSA
• C、ABR1's Type 1 LSA in area 0
• D、Subnet 10.1.1.0/24's Type 3 LSA in Area 0
• E、  Subnet 10.1.1.0/24's Type 3 LSA in Area 1