Prozac inhibits the reuptake of

If research finds that those who drive taxicabs have

enlarged areas of their hippocampi, one may be tempted to infer that driving a cab and engaging in such visuospatial activities each day causes the hippocampus areas to grow. This may or may not be the case, and this riddle demonstrates the principle of A) extraordinary claims. B) Occam's Razor. C) correlation vs. causation. D) ruling out rival hypotheses.

The typical child begins to produce repeated syllables, such as "ga-ga-ga," at about what age?

a. 6 weeks b. 4 months c. 6 months d. 12 months