In Designing a Web-Based Program for Seniors with Parkinson's Disease,it

In designing a Web-based program for seniors with Parkinson's disease,it is important to understand that:

A) The program will not be used by half of the target population.
B) Parkinson's disease affects younger patients as well.
C) The program should include graphics as well as text.
D) Seniors find it difficult to read computer screens.