Task: Sequential_Recommendation

system
You are a helpful assistant. The assistant first thinks about the reasoning process in the mind by using Belief-Desire-Intention (BDI) framework and then provides the user with the answer. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags, respectively. 
Below is an instruction that describes a task. After thinking, when you finally reach a conclusion based on the customer's intention, desire and belief, clearly state the BDI thinking process within <think> </think> and then the answer within <answer> </answer> tags.


user 
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:
Purchase History:
1st: Black Diamond Rocklock Locking Carabiner. Sports & Outdoors. Outdoor Recreation. Black Diamond.
2nd: Mil-Spec Plus Mt. Timp 3 Season Sleeping Bag. Sports & Outdoors. Outdoor Recreation. Mil-Spec Plus.
3rd: Bike Bicycle Red LED Rear Light 3 modes Waterproof Tail Light Blue,Set of 2 [Sports]. Sports & Outdoors. Outdoor Recreation. Buytra.
4th: Under Armour Men's ColdGear Infrared Tactical Hood. Sports & Outdoors. Sports & Fitness. Under Armour.
5th: SE FS374 All-Weather Emergency 2-IN-1 Fire Starter and Magnesium Fuel Bar, Flint and Steel Kit. Sports & Outdoors. Outdoor Recreation. SE.
6th: Stupidbright SBR-1 Strap-On LED Rear Bike Tail Light. Sports & Outdoors. Outdoor Recreation. Stupidbright.
7th: Generic Outdoor Men's Anatomic Relief Bicycle Mountain Bike Saddle VD-104 Black. Sports & Outdoors. Outdoor Recreation. Generic.
8th: Kryptonite New York Noose 1213 Bicycle Chain Lock. Sports & Outdoors. Outdoor Recreation. Kryptonite.
9th: Kryptonite Kryptoflex 1565 Combo Cable Bicycle Lock Bike Lock with Transit FlexFrame Bracket. Sports & Outdoors. Outdoor Recreation. Kryptonite.
10th: Crystalcity-6662 Bicycle Bell Alloy mini. Sports & Outdoors. Outdoor Recreation. Crystalcity-6662.
11th: Bell Lumina Headlight. Sports & Outdoors. Outdoor Recreation. Bell.
12th: Cold Steel Mini Lawman Black G-10 Handle with Black Blade. Sports & Outdoors. Sports & Fitness. Cold Steel.
13th: Cold Steel Chinese Sword Machete 24in Blade. Sports & Outdoors. Sports & Fitness. Cold Steel.
14th: Under Armour Men's Clean Up V Batting Gloves. Sports & Outdoors. Sports & Fitness. Under Armour.

Options:
A: Prodyne PF-20 18 Oz Clear Unbreakable Polycarbonate Mug, Pack of 6. Home & Kitchen. Kitchen & Dining. Prodyne.
B: E-Z UP Directors Chair, Tall Black. Home & Kitchen. Furniture. E-Z UP.
C: Nonwe Men's Outdoor Quick Dry Water-Resistant Breathable Cargo Pants. Sports & Outdoors. Outdoor Recreation. Nonwe.
D: Manual Moxley Boston Terrier Paws and Whiskers Decorative Square Pillow, 18-Inch. Home & Kitchen. Bedding. Manual Woodworker.
E: Barbuzzo Ice Shot Glasses - 12 Mini Ice Glasses and 1 Serving Tray, Reusable - Fill with Water, Fruit Punch, Soda, Jelly, then Freeze and...
F: Chef Craft 21314 1-Piece Jumbo Flexible Turner, Blue or Gray, 14-1/2-Inch. Home & Kitchen. Kitchen & Dining. Chef Craft.
G: CHEFS Kitchen Tool Crock, Gray. Home & Kitchen. Kitchen & Dining. CHEFS.
H: Lens Cap compatible with GoPro® Hero3 Camera (Not Hero3+ or Hero4). Electronics. Camera & Photo. Unknown.
I: SanDisk 32GB Micro SDHC Class 4 TF Memory Card for Samsung Galaxy Note 2 Galaxy S Relay 4G Stellar Ativ S Tablet with SoCal Trade,...
J: Whizzotech Velocity S/PDIF Digital Coaxial Audio/Video RCA Cable Cord RG59 Coax Glod (3 Feet). Electronics. Accessories & Supplies. Whizzotech.
K: iPazzPort Mini Wireless Keyboard with Backlit and Touchpad for Android TV Box and Raspberry Pi 3 and HTPC KP-810-21TL. Electronics. Computers & Accessories. iPazzPort.
L: Ka-Bar Straight Leather Handled Mark 1 Knife. Sports & Outdoors. Sports & Fitness. Ka-Bar.
M: Disney Frozen Shower Curtain Hooks - Set of 12. Home & Kitchen. Bath. Disney.
N: Ethiopian Myrrh - 4 Ounces - Bulk Incense Resin. Home & Kitchen. Home Dcor. Bulk Resin.
O: Windsor Electronic Whistle Single-Tone. Sports & Outdoors. Sports & Fitness. Tide.
P: Aircee (TM) 40L~45L Multi-use Outdoor Sports Camping Hiking Daypack Bugout School Bag Tactical Army Military Camouflage Backpack. Sports & Outdoors. Sports & Fitness. Aircee.
Q: Winsome Wood Snack Table, Antique Walnut Finish, Set of 4. Home & Kitchen. Furniture. Winsome Wood.
R: Iron Gym Total Upper Body Workout Bar - Extreme Edition. Sports & Outdoors. Sports & Fitness. Pro Fit.
S: 1byone Wireless Alert System with 2 Motion Sensors, Alerts You Anywhere Inside Your House, Black ¡­. Electronics. Security & Surveillance. 1byone.
T: Fridge Coaster Combo Pack, Blue (Set of 6). Home & Kitchen. Kitchen & Dining. Fridge Coaster.


assistant
Answer: R