We are given that a student will study German for at least 3 years.
In the given problem, variable x is take for number of years.
For the given problem we have " At least" phares there.
At least represents " Greater than or equal to inequality sign".
That is ≥.
Therefore,
For " at least 3 years" we could write "≥3.
And final expression could be written as x≥3.
Therefore, correct option is B option B. x ( ≥ ) 3.