Multi-choice problem: Continue writing the next sentence in this paragraph:

How to perform an absorption based assay
Read the assay instruction sheet before starting the experiment.
Gather all materials and equipment needed to perform the experiment.
Plan out how much of each material will be needed to obtain the desired concentrations and which wells of the microplate to put it in.

Choices: (a). Calculate at least how many chunks of microplate per 100 gallons. For x (169x10 square) there is no limit on how many lumps of microplate per 100 gallons. (b). Follow the instruction sheet in order to create the right mixtures of chemicals. Add in the necessary reagents (enzymes, buffer solution, etc. (c). Ask for an assay ruler before placing it in the experiment. Determine a diagnostic baseline for each material. (d). Place the sheet of silica gel gel into the autosepotting system. This can be purchased from a local pet store or made by hand.
(b).