Read the text. Answer the questions

Mr. Brown and some volunteer conservationists are on a very dirt beach now. Today they are ready to make the beach a clean and beautiful place again. After listening to Mr. Brown’s instructions, they are divided into three groups. Group one needs to walk along the shore. Group two should check the sand, and Group 3 has to check among the rocks. Garbage must be put into plastic bags, and the bags will be collected by Mr. Jones. He will take the bags to the garbage dump. Each member is given a map to find the right place. They won’t eat the picnic lunch provided by Mrs. Smith until the whole area is clean. They are all eager to work hard so as to refresh this spoiled area.

Where are Mr. Brown and volunteer conservationists now?

A. They are on the riverbanks

B. They are on a very dirty beach now

C. They are on the paddy field

D. They are at the foot of a mountain and by a river.