In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D". 

Ex Input:
[header] How to remove paint from a car exterior [title] Park the car on top of a large tarp or drop cloth to contain the old paint. [step] The old paint should be disposed of instead of letting it contaminate the ground. If an open area is not available, park the car inside a garage, but open all of the garage's windows and doors for ventilation. <sep> (A) Cover objects inside the garage to protect them from the paint dust. [title] Use masking tape to cover the areas of the car that won't be sanded. (B) Alternatively, use a flashlight to check beneath the tarp. [title] Use an old baseball bat, crowbar, pry bar, or other large object to push the old paint off of the vehicle. (C) [title] Wipe the paint with a wet cloth, a roller wrap or an old towel to protect it from oil and water. [step] The paint is likely to collect on these cloths and make them easier to clean as they are removed. (D) If your garage is not well ventilated, a ventilation device will block your windows when the old paint has dried to a mud-like consistency. [title] Pour a small amount of vinegar into a small bucket.

Ex Output:
A


Ex Input:
[header] How to change trackpad settings on macbook pro [title] Find the system preferences. [step] Starting from your main desktop screen there are two ways to find the system preferences where the mouse and touchpad settings will be located : [title] Bring your cursor to the bottom screen and find the system preferences application. [step] The icon looks like a box with three gears inside it. <sep> (A) Open that to find all your system preferences. [substeps] Alternatively, you can use the spotlight feature. (B) On macbook pro this icon resembles a round blue square with a horizontal green dot on it. On other applications this icon is actually a box with a gear, and is small in appearance. (C) It can be located on the taskbar or in the upper left-hand corner of the window. [title] Let the system preferences application perform its work. (D) [title] Click the customize key in the dialog box. [title] Follow the on-screen instructions to change the customization function.

Ex Output:
A


Ex Input:
[header] How to calculate the finance charge on a credit card balance [title] Know what a finance charge is. [step] Credit card terms can be confusing to navigate for many, so understand what a finance charge is and how it affects you. [substeps] A finance charge is what allows credit card companies and lenders to make a profit off of you. <sep> (A) It's more or less a fee charged for the use of your credit card. Finance charges on credit cards, mortgages and car loans have ranges that depend on a borrower's credit score. (B) A cash charge is when a company brings in a bank statement or a check and debts from the statement of that paycheck. A finance charge is what the bill is, essentially, provided the debtor is a credit card company and not a lenders. (C) A credit card charge is an immediate cost of the purchase of your car. When you borrow money from the bank, interest and fees are added together in a charge to make up for the balance, thus reducing your interest payments. (D) It is usually under 10% of the amount borrowed to the company unless your credit card company commits a penalty. If you are in a high interest category that allows you to charge interest on your bank statements, choose the " freeze " option to compute a charge.

Ex Output:

A