A Group of Nursing Students Conducts a Small Research Project

A group of nursing students conducts a small research project examining the most effective means to deliver medication education to older adults.Their sample consists of 100 adults from ages 55 to 101 who live in the same community.The students conclude that individuals from ages 55 to 64 prefer computerized instructions,and individuals from ages 65 to 100+ prefer typewritten instructions.What is a potential problem with this study?

A) The sample size of 100 is too small to draw any conclusions.
B) The older adults ranging in age from 65 to 100+ were grouped into one category.
C) It has been proven that older adults are not computer literate.
D) The study design is not a randomized,controlled trial.