A. virchow hypothesized that cells divide to form new cells. b. hooke gave the name "cells" to the little boxes he saw under magnification. c. the first microscope was invented. d. schleiden concluded that all plants are made up of cells, and schwann concluded that all animals are made of cells.

It is not absolutely clear, but as far as I have understood, you need  to number the events in the correct historical order. If so, here is the sequence which I consider correct : 
1. the first microscope was invented 
2.hooke gave the name cells to the little boxes he saw under magnification 
3.schleiden concluded that all plants are made up of cells and schwann concluded that all animals are made of cells 
4.virchow hypothesized that cells divide to form new cells 

Iwannasay c is the most accurate