Freda grows potted plants outside in the summer. When the weather is very hot, her plants need to be watered every day to keep them from wilting. For a class project, Freda designed a system that would automatically water her plants at 10:00 p. m. on days when the temperature reached 90°F. These are the steps she followed to design it:

Freda researched automated watering systems.

She brainstormed different solutions, then chose that one that she thought would work the best.

She sketched a design of the system and listed the equipment she would need to build it.

Next, Freda wanted to build her system, but she discovered that she could not afford to buy all the materials.

What mistake did Freda make in her design process that kept her from completing her project?

A.
She did not communicate her solution to others.
B.
She did not account for cost constraints in her solution.
C.
She did not evaluate her product in order to improve its design.
D.
She did not include measurements in her design sketch.