A.  x  ≥ 4
Step-by-step explanation:
When circle closed we use  ≥ to show an equal quantity stop
When circle closed at the lowest inequality we show a less than or equal to inequality ≤
When circle open we just apply the same > to show a larger quantity stop
when circle open we just apply the lowest inequality <
so < and  ≤  is lowest numbers compared.
and  > and ≥ is higher numbers compared.