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: Kensington Expert Trackball Mouse (K64325). Electronics. Computers & Accessories. Kensington.
2nd: Panasonic  Lumix DMC-FZ28K 10MP Digital Camera with 18x Wide Angle MEGA Optical Image Stabilized Zoom (Black). Electronics. Camera & Photo. Panasonic.
3rd: Samsung Galaxy Tab 3 Kids Edition (7-Inch with Orange Bumper Case). Electronics. Computers & Accessories. Samsung.
4th: Samsung Galaxy Tab 2 Bundle: 10.1-Inch 16 GB Tablet (White), Bluetooth Keyboard and Desktop Dock. Electronics. Computers & Accessories. Samsung.

Options:
A: Shimano XT SL-M770 Right Shift Lever. Sports & Outdoors. Outdoor Recreation. SHIMANO.
B: Cobalt Blue Bottle Serving Platter. Home & Kitchen. Kitchen & Dining. Wild Eye Designs.
C: CORSAIR SF Series, SF450, 450 Watt, SFX, 80+ Gold Certified, Fully Modular Power Supply. Electronics. Computers & Accessories. Corsair.
D: Blue Bellies 8 Inline Skate Wheels 76mm 78a, Clear/Blue. Sports & Outdoors. Outdoor Recreation. Blue Bellies.
E: SmackTom(TM) Premium Quality Black Leather Skin Case Cover for Apple® MacBook Air® 11" A1370 / A1465. Electronics. Computers & Accessories. SmackTom.
F: Magnuson Industires 4U-YE3M-73XH Mason Jar Pouring Spout Regular Jar Size 2 Pack. Home & Kitchen. Kitchen & Dining. Magnuson Industires.
G: Bluetooth Headphones with Mic Earphones Sport Earbuds Car Headset Compatible with iPhone Xs XS Max XR X 8 7 6s 6 Plus S9 S8 S7...
H: Audio Technica ATH-M50X Headphones + Slappa Case + Headphone Amplifier (Black). Electronics. Headphones. Audio-Technica.
I: Hornady AB1 Lock-N-Load Anvil Base Kit. Sports & Outdoors. Sports & Fitness. Hornady.
J: WD  WD 500 GB 2.5-Inch Laptop Mainstream WDBMYH5000ANC-NRSN. Electronics. Computers & Accessories. Western Digital.
K: [Rhino] Purple Hot Pink Heavy Duty rugged impact Hybrid Case with Kickstand For Samsung Galaxy Tab 2 (7.0 Inch) tablet. Electronics. Computers & Accessories. RH.
L: SHARKK Digital Grill Thermometer Cooking Thermometer Instant Read Digital Meat Thermometer. Home & Kitchen. Kitchen & Dining. SHARKK.
M: D-Link  DIR-825 Extreme-N Dual-Band Gigabit Router. Electronics. Computers & Accessories. D-Link.
N: EyeLine Golf Target Circle. Sports & Outdoors. Sports & Fitness. EyeLine Golf.
O: Loloi LYONHLZ03FV0077A5 Lyon Area Rug, 7'-7" X 10'-5", Festival. Home & Kitchen. Home Dcor. Loloi.
P: Calf Compression Sleeves (One Pair) for Basketball,Baseball, Running & Outdoor Activities. Sports & Outdoors. Sports & Fitness. Blink.
Q: G4Free 12x25 Compact Binoculars(BAK4,Green Lens),Large Eyepiece Super High-Powered Field Surveillance Binoculars. Electronics. Camera & Photo. G4Free.
R: CyberPower CSB100W Essential Surge Protector, 900J/125V, 1 Outlet, Wall Tap. Electronics. Accessories & Supplies. CyberPower.
S: Gaiam Kids Balance Cushion, Inflatable Wobble Disk Active Sitting Chair Seat Cushion with Inflation Needle. Sports & Outdoors. Sports & Fitness. Gaiam.
T: Canon Soft Leather Case for Canon Digital ELPH Cameras (Black). Electronics. Camera & Photo. Canon.
Answer: R