Answer:
The correct answer is B: online atlas.
Explanation:
We use an atlas to find different geographical things (e.g. states, cities, seas, oceans, continents, etc.) which represent all the parts of the world in the form of a book. Therefore, if you want to find the geographic location of China, you should find the answer in an atlas.
On the other hand, an almanac represents a collection of different annual publications or events.
We use a dictionary to find a meaning of the words, the scope of its use, synonyms, antonyms, etc.
Encyclopedia represents is a book which contains general knowledge information about different things and topics.