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 the items in options and predict the user's next purchase from the listed options by analyzing her historical purchases.

Input:
Purchase History:
1st: Shinai Kendo Stick Bamboo Sword.  Shinai.
2nd: Raskullz Shark Helmets. Sports & Outdoors. Outdoor Recreation. Raskullz.
3rd: Potable Aqua Water Purification Treatment (50 Tablets) - Portable Drinking Water Treatment Ideal for Emergencies, Survival, Travel, and Camping. Sports & Outdoors. Outdoor Recreation. Potable...

Options:
A: Demon Mini Ski/Snowboard Waxing Iron. Sports & Outdoors. Outdoor Recreation. Demon United.
B: Chroma 6197 Betty Boop 6" x 8" Decal - Holographic. Home & Kitchen. Wall Art. Chroma Graphics.
C: Spectrum Diversified Luna Paper Towel Holder, Satin Nickel. Home & Kitchen. Kitchen & Dining. Spectrum Diversified.
D: Home Basics Portable Kitchen Storage Island Trolley Cart with 2 Drawers White and Oak. Home & Kitchen. Furniture. Home Basics.
E: Leegoal 8 Cavity Insect Silicone Cake Mold Pan (Random Color). Home & Kitchen. Kitchen & Dining. Leegoal.
F: iMicro Pure USB Digital USB2.0 Speaker System (Black). Electronics. Computers & Accessories. iMicro.
G: Yakima Hold Up Bike Rack w/ Lock Cable. Sports & Outdoors. Outdoor Recreation. Yakima.
H: Bicycle Pizza Cutter - TOUR de PIZZA - Dual Stainless Steel Non-Stick Cutting Wheels - Display Stand - A very Cool Gift for the Kitchen...
I: CaseCrown Poly Messenger Bag (Brown) for 11 Inch Apple MacBook Air. Electronics. Computers & Accessories. CaseCrown.
J: Trademark Innovations Chicken and Eggs Vintage Retro Tin Sign 15.7" x 8.2" (Red). Home & Kitchen. Home Dcor. Trademark Innovations.
K: 100 Plastic Flower Hawaiian Tropical Luau Lei Party New. Home & Kitchen. Event & Party Supplies. Fun Express.
L: Kikkerland Camouflage Bottle, Large, Green. Home & Kitchen. Kitchen & Dining. Kikkerland.
M: Sony SRFH4 Analog Tuning AM / FM Headphone Radio (Discontinued by Manufacturer). Electronics. Portable Audio & Video. Sony.
N: INVELLOP Orange Leatherette Case Cover for iPad mini (Built-in magnet for sleep/wake feature). Electronics. Computers & Accessories. INVELLOP.
O: Serious Ties - Extra Heavy Duty Cable Ties (10, 36 inch/175Lbs/Natural). Electronics. Accessories & Supplies. Serious Ties.
P: Fox 40 Classic CMG Official Finger Grip Whistle. Sports & Outdoors. Sports & Fitness. Fox 40.
Q: Intex Fabric Extra Wide Camping Mattress. Sports & Outdoors. Outdoor Recreation. Intex.
R: MYSKY HOME Top Grommet Window Embroidery Voile Embroidered Sheer Curtain Panel for Living Room, Beige - 53"W x 96"L - (1 Panel). Home & Kitchen...
S: 2 Pack - Swiss STAR Vegetable Peeler, Carbon Steel Blade and Stainless Handle. Home & Kitchen. Kitchen & Dining. Zena Swiss.
T: QNAP 12 Bay Thunderbolt 2 Das/NAS/iSCSI IP-San, Intel Skylake Core i7 3.4GHz Quad Core (TVS-1282T-i7-32G-US). Electronics. Computers & Accessories. QNAP.


assistant
Answer: Q