Given the task definition and input, reply with output. 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".

[header] How to find the best gas prices [title] Take a mental note daily of the gas prices as you drive throughout your local area. [step] Stop and fill up at the place with the lowest gas price you saw. When traveling long distances, pay attention to the gas prices in various areas so you can have an idea of where to fill up on the way back home. <sep> (A) [title] Call and talk to your friends who drive past other fuel stations in the area. [step] Ask them if they notice a price lower than what you know to be the best price, and visit that location. (B) [substeps] You can also try searching your internet to see what prices are listed on the map. Place the map in a place that is easy to find and then walk around using it. (C) [title] Purchase gas at big-box gas stations, supermarkets, or convenience stores. [step] The place that you use to buy gas is likely one of the biggest gas stations in the country. (D) [substeps] Oftentimes, gas prices drop as the road is less trafficked. If you suspect this may be the case, take your time finding the best gas prices online, or in the internet.
A