You would expect a patient with AIDS to have 

One problem with electronic health records is that

A) Two people, in two different places, can access the same record at the same time B) Only younger staff members learn the system quickly–older staff take longer to learn new things C) If the power goes out, you do have not access to the records D) The systems can be very expensive to install and train staff to use

Which of the following is NOT a factor that affects the strength of concrete?

A. Aggregates B. Admixtures C. Reinforced concrete D. Water-to-cement ratio