Congress cannot establish an independent agency so that it can keep particularly tight control over that agency's functions

Why can you argue that single-case designs are both strong and weak in external validity?

What will be an ideal response?

In 1900, at the University of Pittsburgh, the first experimental radio transmission was made by __________

a. Alexander Graham Bell b. Reginald Fessenden c. William Randolph Hearst d. Edward Murrow