در جمله زیر در جای خالی enter صحیح است یا entering

From the point of view of the public purse, as mothers ....................... employment they are likely to claim fewer benefits and to generate extra revenues through income tax and national insurance contributions.

سلام دوستان ..........در جای خالی کسی میتونه با تحلیل بگه enter صحیح است یا entering ?