Idioms and Phrases - Verbal and Reasoning

In the following questions four alternatives are given for the idiom/phraseitalicised and underlinedin the sentence. Choose the alternative which best expresses the meaning of idiom/phrase.
Q1:

He intends setting up as a lawyer in the adjoining district.

A To establish himself

B To migrate

C To join

D To settle

ANS:A - To establish himself

No answer description is available.