The size of a cell is limited by the

Surface area to volume ratio

Explanation:

Cell contains both a proper surface area as well as a volume it occupies.

The structure of cell vary based on their functions, like neurons are cells which are longer in size as they have to transmit messages from one cell to another.

The size of a cell also not remains same during whole its life. When the cell is in its growth period , its surface area increases less quickly than its volume.

A smaller cell is more effective and transporting materials, including waste products, than a larger cell. So, if the cell has to become very very large in size, it must has to increase its surface area. However, the less surface area of a cell hinders the nutrients uptake of a cell that is required for its maintenance.

So, we can say that Surface area to volume ratio is the important factor that limits cell size.

Hope it help!

d. the weight of the book

your answer should be c) enjoy!