According to the text, which of the following conditions is most likely to be added as a diagnostic category in the next edition of the Diagnostic and Statistical Manual?

Asthenia is characerized by

A. slurred speech B. inability to make rapid movements like finger tapping C. fatigue in skeletal muscles after minor physical activity D. quivering movements

The Macintosh computer is "user friendly" because

(a) most of the information needed to use it is in the environment (b) the users' and designers' conceptual models are close together (c) the control information is meaningful rather than arbitrary (d) all of these (e) none of these