Improve the bracketed part of the given sentence.
You must (accustom yourself with) new ideas.

Options

A. A. accustomed yourself with
B. B. accustom yourself to
C. C. No Improvement
D. D. get accustom to

Answer

B

Explanation

Here, accustom yourself to is the right usage.
accustom (V.) : agrees with to (Prep.)