Instruction: Rank items in listed options based on the user's purchase history to determine the item that the user is most likely to purchase next. Output the item with the highest likelihood of being the next purchase.

Input:
1st: Antec NSK2480 Desktop case 380W PS. Electronics. Computers & Accessories. Antec.
2nd: Roku 2 XD Streaming Player 1080p (Old Version). Electronics. Television & Video. Roku.

Options:
A: Goldengulf 2017 Newest 9" inch DUAL CORE dual camera Newest MID Google Android 4.2 Tablet PC Capacitive CPU WM8880 8GB Flash 11.1,Registered in Washington. Electronics...
B: Betty Ruffled Voile Layers Shower Curtain 70 x 72 Chocolate. Home & Kitchen. Bath. Kashi Home.
C: GertBoard I/O Extension Board for the Raspberry Pi. Electronics. Computers & Accessories. Raspberry Pi.
D: RST Aerial 29 Mountain Bike Disc Hydraulic Lock Fork 1-1/8" 29er. Sports & Outdoors. Outdoor Recreation. RST.
E: Extrasport Boat Tushion Bouyant Type IV Boat Cushion Flotation Device. Sports & Outdoors. Sports & Fitness. Extrasport.
F: Live to Conquer Mens Silicone Wedding Ring - The Comfortable, Safe Alternative for Those who Lead an Active Lifestyle. Simple design. The perfect gift for...
G: Xtenzi Aux Cable for Audi AMI MDI MMI 4F0051510G USB Audio MP3 music interface Adapter for Audi A3/A4/A5/ A6/A8/S4/S6/S8/ Q5/Q7/R8/ TT and Volkswagen Jetta/ GTI/...
H: Lexar JumpDrive S45 16GB USB 3.0 Flash Drive - LJDS45-16GABNL (Orange). Electronics. Computers & Accessories. Lexar.
I: 4 Blue Pro Longboard Wheels 70mm 80a Skateboard Deck W/ Abec 7 Bearings. Sports & Outdoors. Outdoor Recreation. Wheels.
J: Certified International Santa Fe Canister Set, 4-Piece. Home & Kitchen. Kitchen & Dining. Certified International.
K: Deluxe Quality Classic White Matte Finish Stainless Steel Sliding Lid Rolltop 2 Loaf Bread Box / Storage Bin. Home & Kitchen. Storage & Organization.
L: Glass Sesame Seed Grinder, Flax Seed Grinder by Asvel. Home & Kitchen. Kitchen & Dining. Asvel.
M: Superband PREMIUM Insect Repellent Bracelet: Assorted Colors - Red, Blue, Yellow (10 Pack). Sports & Outdoors. Outdoor Recreation. Superband.
N: Andux 3pcs/Set Long Neck Golf Hybrid Club Head Covers Interchangeable No. Tag Pack of 3 CTMT-01. Sports & Outdoors. Sports & Fitness. Andux.
O: Bluedio Bluetooth Wireless Headphone Purple (Bluedio (UFO)). Electronics. Headphones. Bluedio.
P: Waring Commercial WFP14S Batch Bowl Food Processor with LiquiLock Seal System, 3-1/2-Quart. Home & Kitchen. Kitchen & Dining. Waring.
Q: A2S Survival Gear Paracord 30pcs Emergency Kit First Aid Kit & Emergency Food finding Fishing Gear & Baits Compass Emergency Whistle Fire Starter set Survival...
R: WALI SAS SATA Tray Caddy for PowerEdge R310, R320, R410, R415, R510, R515 0F238F, F238F, X968D, 0X968D, G302D, 0G302D Exclusively. Electronics. Computers & Accessories. WALI.
S: Microtex (R-002406-2PK Tire Applicator Pad, (Pack of 2). Home & Kitchen. Bath. Microtex.
T: Happy Sales HSTS-PMR02,  Japanese Tea Set Teapot Teacup Red Calligraphy. Home & Kitchen. Kitchen & Dining. Happy Sales.
Answer: R