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: Based on the user's historical purchases, rank the items in options and predict the next product of the user's interest from the provided options.

Input:
Purchase History:
1st: Kershaw Tanto Groove Knife with 3-D Machined Grooves on Blade. Sports & Outdoors. Sports & Fitness. Kershaw.
2nd: Maxpedition Monsoon Gearslinger. Sports & Outdoors. Outdoor Recreation. Maxpedition.
3rd: Maxpedition M-1 Waistpack. Sports & Outdoors. Sports & Fitness. Maxpedition.
4th: Maxpedition Bottle Holder. Sports & Outdoors. Sports & Fitness. Maxpedition.
5th: Explorer Tactical 12 Pistol Padded Gun and Gear Bag. Sports & Outdoors. Sports & Fitness. Explorer.
6th: ILBE Assault Pack Generation 2 Marpat Previously Issued [Misc.]. Sports & Outdoors. Sports & Fitness. Propper.
7th: CONDOR Deployment Bag. Sports & Outdoors. Sports & Fitness. CONDOR.
8th: CamelBak Hydration Desert Camo. Sports & Outdoors. Outdoor Recreation. CamelBak.
9th: Schrade SCHF10-BRK Fixed Blade. Sports & Outdoors. Sports & Fitness. Schrade.
10th: Cold Steel CS20LTS-BRK Tuff Lite. Sports & Outdoors. Sports & Fitness. Cold Steel.

Options:
A: adidas Youth Graphic Medium No-Show Sock (6 Pack). Sports & Outdoors. Sports & Fitness. adidas.
B: Beats Solo HD On-Ear Headphone Matte Black (Refurbished). Electronics. Headphones. Beats.
C: Snugg iPod Touch 6G/5G Rubber Case & (Blue Silicone) for iPod Touch (5th/6th Generation). Electronics. Portable Audio & Video. Snugg.
D: Capezio Girls 2-6X Sweetheart Tutu Dress. Sports & Outdoors. Sports & Fitness.
E: Speedo Air Seal Tri Swim Goggle, Smoke/Ice . Sports & Outdoors. Sports & Fitness. Speedo.
F: Panasonic SL-MP80 CD/MP3 Player. Electronics. Portable Audio & Video. Panasonic.
G: Solo Distributors Ultimate Baseball Trainer, 5 Skills 1 Trainer. Sports & Outdoors. Sports & Fitness. Solo Distributors.
H: Brita Small 5 Cup Water Filter Pitcher with 1 Standard Filter, BPA Free – Metro, Red. Home & Kitchen. Kitchen & Dining. Brita.
I: Chic Home 3 Piece Josepha Pinch Pleated Ruffled & Pintuck Sherpa Lined Comforter Set, Queen, Grey. Home & Kitchen. Bedding. Chic Home.
J: Canon NB-5L Battery for Canon PowerShot SX Cameras (Halcyon Brand). Electronics. Camera & Photo. Halcyon.
K: Nike Insulated Lunch Bag - Black,one size. Home & Kitchen. Kitchen & Dining. Nike.
L: eHub Sports Earphones for Running: Bluetooth, Sweat-Proof, Sleek Design with Built-in Microphone!Choose the color that suits you!. Electronics. Headphones. eHUB.
M: Circleware Oliveto Olive Oil and Vinegar Glass Dispenser Bottles with Pourer, Set of 2, 9.3 Ounce, Limited Edition Glassware Serveware. Home & Kitchen. Kitchen &...
N: Digital Concepts BP-3700CL Battery Equivelent to Nikon EN-EL 5 1100MAH Lithium Ion Battery. Electronics. Camera & Photo. Sakar.
O: Spec.-Ops. Brand Combat Master Knife Sheath 6-Inch Blade (Short). Sports & Outdoors. Sports & Fitness. Spec.-Ops. Brand.
P: VHC Brands Classic Country Primitive Bath - Burlap Black Check Black Shower Curtain. Home & Kitchen. Bath. VHC Brands.
Q: 2 Tommy Bahama Backpack Cooler Chair with Storage Pouch and Towel Bar (Orange/Red and Green/Blue). Sports & Outdoors. Outdoor Recreation. Tommy Bahama.
R: Olympus C-770 Ultra Zoom 4MP Digital Camera with 10x Optical Zoom. Electronics. Camera & Photo. Olympus.
S: KR Ideas Foot Stool, 4" Tall, Oak, Clear Finish (Made in the USA). Home & Kitchen. Furniture. KR Ideas.
T: Command Outdoor Window Hook, Large, Clear, 1-Hook (17093CLR-AWES). Home & Kitchen. Home Dcor. Command.


assistant
Answer: O