Cells are small. Cells are alive. Cells move quickly. Cells have an electrical charge.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: With the development of the microscope, scientists were able to see cells for the first time. Why was it difficult to view cells without a microscope?
Possibilities:
- Cells are small.
- Cells are alive.
- Cells move quickly.
- Cells have an electrical charge.

Cells are small.