Answer:

I would pick it up & put it in dustbin

I would encourage other people to do the same

I would explain then not to litter

Explanation:

Wanda always sat on the seat next to the last seat, in the last row, in Room Thirteen. She used to sit there because her feet were normally caked with dry mud and very dirty. So in order to avoid being laughed at by her classmates, she always sits there to hide her dirty feet.