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: Given the products the user has purchased in history, rank the items in the listed options and output the item that the user is most likely to purchase next. Answer from one of the options.

Input:
Purchase History:
1st: iPhone 6s Case, SUPCASE Apple iPhone 6 Case Water Resist Full-body Protection Heavy Duty Case with Built-in Screen Protector and 3 Interchangeable Covers (Space Gray/Silver/Gold),...
2nd: Marcy Exercise and Workout Barbell Sleeve / Foam Pad MT-3. Sports & Outdoors. Sports & Fitness. Marcy.
3rd: CAP Barbell Olympic 2-Inch Spring Clip Collars, Pair. Sports & Outdoors. Sports & Fitness. CAP Barbell.

Options:
A: Mens Canvas Leather College School Bookbag Laptop Bag Rucksack Backpack Daypack. Electronics. Computers & Accessories. VOCHIC.
B: Pinnacle Studio Ultimate Collection v.15 [Old Version]. Electronics. Computers & Accessories. Avid.
C: Bold Statement Pillowcases 300-Thread-Count Standard Size 21 x 30 - Dance All Night Sleep All Day. Home & Kitchen. Bedding. 365 In Love.
D: All American 72 Pressure Cooker Steam Gauge. Home & Kitchen. Kitchen & Dining. All American.
E: Toshiba 52HM84 TV Replacement Lamp with Housing. Electronics. Accessories & Supplies. FI Lamps.
F: Nikon ML-3 Compact Modulite Remote Set. Electronics. Camera & Photo. Nikon.
G: Chef Tony Grease Away Burger Dog Pan, Metallic. Home & Kitchen. Kitchen & Dining. Chef Tony.
H: 3 Pack of Kitchenaid 9704230 Blender Coupling. Home & Kitchen. Kitchen & Dining. KitchenAid.
I: Horizon Tactical Blood Type Embroidered Shoulder Patches (B+POS).  HORIZON OUTDOOR.
J: Trangia Upper Windshield. Sports & Outdoors. Outdoor Recreation. Trangia.
K: RCA Lyra Slider 8GB Digital Media Player (Black). Electronics. Portable Audio & Video. RCA.
L: Handmade Irish Stoneware Garlic Keeper with Air Ventilation Holes to Store Garlic Bulbs and Keep Fresh. Home & Kitchen. Kitchen & Dining. Kiltrea Pottery Ireland.
M: Trends International Teen Wolf Ash Wall Poster 22.375" x 34". Home & Kitchen. Wall Art. Trends International.
N: 2X 1 Black and 1 Silver Rogue River Tactical 6-in-1 Multitool Rescue Folding Pocket Knife Survival w/ Fire Starter, LED Flashlight.
O: 2.5" Acrylic Clear Baby Pacifier Baby Shower Favors - 48 Pieces. Home & Kitchen. Event & Party Supplies. NST.
P: Polar FT7 Heart Rate Monitor - Black/Silver. Sports & Outdoors. Sports & Fitness. Polar.
Q: Zavelio Unisex Shearling Sheepskin Trooper Russian Ushanka Winter Fur Hat. Sports & Outdoors. Outdoor Recreation. Zavelio.
R: eBerry® Plug and Play Home Studio Adjustable USB Desktop Microphone Compatible w/ PC and Mac,ideal for Chatting, Skype, Recording (Black). Electronics. Computers & Accessories. eBerry.
S: RockShox XC32TK Crown Adjust Solo 100mm Air Fork, Black, 26-Inch. Sports & Outdoors. Outdoor Recreation. RockShox.
T: Asus P5Q PRO Turbo Core 2 Quad/Intel P45/ DDR2-1300/ A&GbE/ATX Motherboard. Electronics. Computers & Accessories. Asus.


assistant
Answer: P