The answer is A. Apicomplexa.
They both are encased organelle compartments inside a cell but A vacuole is the vesicle found within a cytoplasm of a cell. The vacuole contains some fluid. A lysosome, on the other hand, is an organelle found within the cytoplasm of eukaryotic cells.
The correct choice is velocity=distance/time of v=d/t
The answer is D
Consulting their chemistry teacher and other students in class would not be in depth enough, so A and B are not the answers.
While consulting a chemistry textbook will be useful, the scientific journal is not the best choice.
However, the chemistry textbook would be great, and the periodic table of elements os necessary if they are doing a study about it so the best answer would be D.
Hope this helps!