Directions: In the following question, a sentence is given with four words marked as (A), (B), (C), and (D). These words may or may not be placed in the correct order. Four options with different arrangements of these words have been provided. 

While the pandemic and associated school children (A) has affected (B) us in many ways, loss of learning among closure (C) is emerging among the most explicit and worrying (D) aspects.