Instruction: The user's purchase history implies her preferences. Rank the items in the options based on the user's preferences. Output the item that the user is most likely to purchase next from the options.

Input:
1st: Gerber Bear Grylls Ultimate Knife, Serrated Edge [31-000751]. Sports & Outdoors. Sports & Fitness. Gerber Blades.
2nd: SE CCH7-1G 7-IN-1 Green Survival Whistle. Sports & Outdoors. Sports & Fitness. SE.
3rd: Rothco Nylon BDU Belt. Sports & Outdoors. Sports & Fitness. Rothco.
4th: Mylar Men's Emergency Thermal Blankets (10 Pack). Sports & Outdoors. Outdoor Recreation. Mylar.

Options:
A: A&F Rod Décor - Heavy Duty Wall Brackets for 1 inch Rod - Black. Home & Kitchen. Home Dcor. A&F Rod Dcor.
B: Sony MDR-XB30EX Extra Bass In-Ear Headphones. Electronics. Headphones. Sony.
C: Rocketfish Powerline Networking Kit. Electronics. Computers & Accessories.
D: Secura Automatic Electric Conical Burr Coffee Grinder CBG-018 Adjustable Cup Size, 18 Fine - Coarse Grind Size Settings. Home & Kitchen. Kitchen & Dining. Secura.
E: Hunters Specialties Scent-A-Way Scent Elimination Odorless Spray. Sports & Outdoors. Sports & Fitness. Hunters Specialties.
F: Sumnacon Large Bras Wash Bags 3 Pcs - Zippered Mesh Laundry Bag with Plastic Exterior for Delicates Lingerie Underware Socks(White). Home & Kitchen. Storage &...
G: Cinsa 312008 Trend Ware Enamel on Steel Colander, 8-1/2-Inch, White. Home & Kitchen. Kitchen & Dining. Cinsa.
H: Baleaf Men's Compression Base Layer Running Shirts. Sports & Outdoors. Sports & Fitness. Baleaf.
I: Bormioli Rocco 4-1/2-Ounce Bistro Bar Shot Glasses, Set of 6. Home & Kitchen. Kitchen & Dining. Bormioli Rocco.
J: Coleman ATV Rear Padded-Bottom Bag.  Coleman.
K: BRAKCO Floating Pro Mountain Bike Disc Brake Rotor 6 bolts. Sports & Outdoors. Outdoor Recreation. BRAKCO.
L: Matte Solid White Full Housing Shell Case with Buttons Free Tools for Microsoft Xbox One Controller. Electronics. Accessories & Supplies. eXtremeRate.
M: LP Sound Adapter External USB Stereo for Notebook Windows, Mac, Linux Extra Audio Source with Microphone Black. Electronics. Computers & Accessories. LP.
N: Hello Kitty Microfiber Kitty & Me Twin/full Bedding Comforter. Home & Kitchen. Bedding. SANRIO.
O: Molle HYDRATION CARRIER w/2.5L Bladder--OD GREEN. Sports & Outdoors. Sports & Fitness. Molle.
P: Lumsing Full Motion Tilt Swivel TV Wall Mount Bracket Stand for 10-42 Inch LCD LED 13" 15" 17" 19" 20" 22" 23" 24" 26" 27"...
Q: Nearly Natural 4648 Harvest Wreath Fall, 28-Inch, Gold. Home & Kitchen. Home Dcor. Nearly Natural.
R: ViewBook VB730 7-Inch Android 2.2 Wi-Fi/BT Tablet - Black. Electronics. Computers & Accessories. ViewSonic.
S: Disney Frozen Kids 12oz Light Up Fun Sip LED Tumbler with Straw. Home & Kitchen. Kitchen & Dining. Disney.
T: Axle Release Classic Quick Release Adapter-3/8-Inch x 26T axle. Sports & Outdoors. Outdoor Recreation. Axle Release.
Answer: O