Of all the ways to label a study design, the least common, and least useful is based on the timeframe of the study.

In shaken baby syndrome:

a. Both focal lesions and diffuse axonal injury often occur b. There are usually only focal lesions c. The brain is often rotated within the skull by the abuse

In 1886 the American Federation of Labor (AFL) was headed by whom?

A) George Meany B) Samuel Gompers C) James Hoffa D) John L. Lewis