Answer:
The correct option is;
D. She will need to research the problem even more
Step-by-step explanation:
In other to properly design the pool umbrella that will be reliable and meet the needs of the particular customer, she will need to carry out a basic research about the environment where the pool umbrella is to be used, the presence of other factors that can impact on an idea for the pool umbrella.
She can then proceed to create a concept about the proposed pool umbrella, which is in the form of a paper concept
She will then proceed to carry out a more detailed study based on the paper concept that will consist of concept technology and application as well as functionality.