Choose a word that best fits the blank

[lieutrang]

Hi,I really hope that you can help me with this one
'Another factor has recently been added to the childcare _________'
A. sectors B.tasks C.formula D.cost
Which one should I choose to fill in the blank?
Thank you.

 

[Rover_KE]

Welcome to the forum, lieutrang.

We don't spoonfeed answers to homework questions.

Where did the question come from and when do you have to show your answer to your teacher?